Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ
Notes from the video in case anyone wants them Lymphatic system Quitely plays a vital supporting role to both your cardiovascular and immune systems Maintains homeostasis by eventually returning most of the fluid that has been diverted back into your blood Three main parts Lymph- watery solution does not contain red blood cells, which remain in the closed circulatory loop because they are too large to pass through the capillary membrane Lymphatic vessels help to reabsorb fluid Lymph nodes- monitor and clean lymph as it filters through Tonsils, adenoids, thymus, spleen Lymphatic capillaries Lymphatic capillaries are all over the body except for bones, bone marrow, teeth, and CNS Lymphatic capillaries made of loosely overlapping endothelial cells that look like roofing shingles- forming flap-like valves that only open in one direction When the pressure in the interstitial space becomes greater than the pressure inside the Lymphatic capillary the flaps push and open and take fluid in to relive the pressure Once the fluid inside a lymphatic capillary it is now lymph Ducts The right lymphatic duct drains all the lymph collected from the upper right area of the torso as well as the right arm and the right sides of the head and thorax and feeds them all into the internal jugular vein Thoracic duct takes lymph from the rest of the body and dumps it into the subclavian vein They operate under very low pressure Have a series of valves that prevent backflow and are helped along by smooth muscles Edema or swelling that can constrain blood flow Lymph nodes Lymph nodes house T cells that directly attack invaders and manage the immune system, b cells that secrete antibodies into the blood, macrophages that eat up foreign substances, and reticular cells that make up the stroma scaffolding network that supports all other cells in lymphoid tissues Internally each lymph node is divided into distinct cortex and medulla regions: the outer cortex houses dividing B cells, while its deeper areas contain mostly T cells. Lymphocytes Lymphocytes are found in and mature in the loose reticular connective tissue that makes up a large part of the nodes and most your other lymphoid organs The medulla contains both types of lymphocytes Release macrophages and activate the general immune system MALTS Mucosa Associated Lymphoid Tissues (MALTS)- found in mucous membranes around the body, outside the lymphatic vessels Tonsils some of the largest collections of these tissues which together form a ring around the entrance of the pharynx. Where they can inspect everything you eat and breathe They Try to remove any pathogens before they enter the GI tract or lungs Peyer’s Patches- in the distal portion of the small intestine Appendix - contains a bunch of lymphoid tissue to destroy any bacteria before it can breach the intestinal wall during absorption
You will be my saviour during my time in nursing school! I just need to get used to watching these more often (I only come here when I have exams coming up lol)
Resa, totally! I'm pre-nursing as well, and I do the same. That's actually a really good suggestion. Instead of coming here just to cram, we should review all the BIO series in their entirety in my spare time just to really familiarize myself with the systems and physiology.
BTW, is that Pac?? I love it! Whatcha know about 2pac? lol. It's crazy when I listen to a 2pac song that references the year and I'm like, "OMG, that was over 20yrs ago! How did that happen?!"
Just wanted to say, I find these Crash Course videos incredibly helpful for learning about the immune system. You guys are just so good at really explaining things well and are better at helping me to visualize these concepts than a textbook is. Keep up the good work!
That was a fantastic presentation. I have been in medicine the majority of my life and that tops any lesson I've ever had! Both informative and as always, fun to watch. Thanks for sharing with the world! Lauri
Many *commenters say Hank speaks too fast.* That makes it a "Crash Course" & is perfect for review, but if you wanna *_slow it down to soak up info_* that's complex or new to you, *_click the gear in bottom right corner, click speed, click 0.75._* Many know this, but some don't. Hope I helped someone out! Can I get a thumbs up?
Thank you for that but I am looking for the gear but I don't see it. Where exactly is this at? Also, I wonder why we can't reverse it like other clips on UA-cam from other people.
Love the comparison of the lymphatic system to security! It's funny how a simple analogy can make information that seems overwhelming more relatable and less daunting. Thank you! :-)
As someone who has had Primary Lymphedema for the last 30 years, there is more information in this video on Lymphatics than what most doctors know and understand about the Lymphatic system...Thanks for helpting to educate people on their Lymphatics and why they are so important!
Crash Course, I just want to say to keep the good work! It helps me a lot (especially chemistry), and it'll be a shame if it stops, I appreciate the content you make.
For someone who found out there Lymphatic system was the reason they have been debilitating sick I appreciate these videos more than anyone will ever know. It took 2 years of neck pain, multiple diagnoses and sick with every thing you could get the whole time. PEOPLE NEED TO REALIZE!!!
real g!!! Im in tears after this whole week studying for my intro bio class. This is the last video I'm watching for my test tomorrow, and it's really helped me! thank you so much!!!!!
These videos helped me pass Human Anatomy, Microbiology and probably will help me understand the first half of Immunobiology next semester. Thanks Crash course!
when i was little, one of my teachers wore a glove on her hand. I asked her why and she explained that twenty years ago she had cancer and the treatment required that she remove one of her lymph nodes. [insert explanation of lymphatic system] and that since the lymph node wasn't there to let through lymphatic fluid, it flowed down into her hand make it swell without the glove. i would explain this to other kids when i discovered my interest in speaking
+Jeffy Samuel Well, they took one of mine out to make sure I actually had cancer, but it sounds like the rest will be done just with chemo (and maybe radiation).
This is easily one of the best series anyone could ever use to get a good start in their studies for Anatomy and Physiology I & II. Thank you very much Crash Course
I am so inspired, grateful and motivated by Crash Course! Hank, Thought Cafe and all of you hard working, talented individuals who script, design and help deliver this information: You're seriously changing my brain in all the best of ways. Thank you so much, I will gladly contribute to your cause.
C.0.R.E Tech, my chem prof would dig that one. She'd ALWAYS put up cheesy chem jokes and memes in her slides (where I was introduced to ChemCat). She'd read them aloud, then explain them, which made it even funnier as they often didn't need explanation lol.
+herpsenderpsen I like how absolute (enthusiastic?) your immune system is. Fun fact: You have an antibody to destroy the saliva of everyone you have ever kissed on the lips.
***** yes i agree with you, in the human body there is no conflicts between the different motivations of cells and bacteria. They do what nature has always done: adapt to their surroundings. The bacteria does not care if it's in some way "held hostage" by a multi-cellular organism, as long as they survive as a specie. The fact that cells have adapted to live for doing certain "tasks" and in return gain advantages just show how extremely complex nature is, and it's all done without someone ever asking an organism what it would prefer.
+AusSP Sadly, yes - there will be 47 episodes in total, so the end is fast approaching. But the good news is that you can always re-watch these episodes *and* we're going to start a new course in its place! -Nicole
+Pure Madness A representative told me sometimes that happens if your liability is exactly equal to the money in your account. Try reducing your backer's stake by 1p, it should work and won't make much difference.
+Pure Madness . Matched betting means that you win whatever the outcome... Remember you only lose the liability and not the stake amount if you lose on Betfair.
Kassidar I get what you're saying, but I really don't think I have autism. I get daily chronic migraine so my attention isn't always the best, especially if I'm in the postdrome stage of one.
This is my favorite system :) my anatomy instructor called it the shadow of the cardiovascular system. Before that, I took physiology and didn't think much of it, I only thought that it handled the fats from the GI tract. I've since learned so much more by taking immunology and hope other people grow to like it as much as I do.
I have Klipple Trenaunay Weber Syndrome and Lymphedema, a malformation in my lymphatic system which caused me to be born with a swollen right light which eventually worsened as I got older to the point where my toes started discharging a lot of lymphatic fluid and blood non-stop along with a lot of pain and it's still something I have to deal with today at 27. Throughout my life my doctors never properly explained to me what I had so I had to research everything for myself. Actually, my doctors SUCKED! They told me to do things that actually made my condition worse since they didn't really know how to treat it themselves and didn't think to refer me to other doctors that might know how to help me. I'm managing it the best I can now but I want to learn more information about my condition so I can manage it more effectively. Thanks for uploading this. I'm gonna watch all of these videos.
This is just tremendous edutainment. Crash course rocks! I see many say the talk is too fast. No! The speed of the talk is wonderful. It's faster than reading, thanks to the marvelous graphics. (Just stop if you miss something, back up a touch, and you'll inevitably find a word you don't know the definition of. Look it up and then this speed is better than slower.) And one can find the short segment one seeks very readily. Hats off to Crash Course!
I absolutely love Crash Course! I’ve learned so much from you and have had fun doing it! The humorous way that you present the materials is such a refreshing, stress relieving way to approach learning. Thank you guys at Crash course y’all rock!!! Please keep the videos coming....
Im a brazilian student, and omg! Even for me that dont have a fluent vocabulary could understand the class. This helped me better than a bunch of pdfs and old videos that i have. Thank u a lot.
People say you talk too fast. But i think you should never slow down. I always sleep in slow talking lectures and sometimes have to put the speed at 1.25 but crash course you have done it for me. Thanks a bunch
BRAVO! I enjoyed Hank's unsung lymphatic system immensely, a great refresher course and learning tool to pull together stuff I had and have yet to learn! Excellent job!
Thank you so much for making my work easy..................... I just love your videos and there is fun in learning with your videos being provided :) Cheers !
+thesinaclwon He *does* know this material quite well, but he uses a teleprompter. The scripts are written and edited by the brilliant Katie Yale and Blake DePastino. -Nicole
My lymphatic system is almost as much of a failure as I was in my second semester of Astronomy in college. Good to have a chance to learn all about the failure!
Honestly, there is so much variation in the human body that I can tell you without a doubt that the body's vessels are not textbook perfect. So whether it's R subclavian vein or R internal jugular vein, the right thoracic duct drains into that general area because both (subclavian and inter. jug.) drain into the R brachiocephalic vein --> superior vena cava --> R atrium. Source: Dissected and learned from 4 different human cadavers.
4:54 , I'll ignore the fact that they both dump into the junction between the respective internal jugular and subclavian veins. The arrow pointing to the subclavian vein is pointing to the superior vena cava not the subclavian... subclavian means below the clavicle.. not the part thats about to enter the heart.
just paused the video to say thank you so much for making these videos! my Bio teacher is so boring and hard to understand so I'm watching your videos to help me understand my notes and prepare for the exam. thank you!
Excellent presentation. But you forgot to mention how where and how the lymphatic system dumps its waste and how a congested lympathic system is the main cause of almost every chronic, "incurable" disease.
Now that I understand tonsils and their function, I'm so sad that I had mine removed when I was a teenager, due to experiencing recurrent tonsilitis. Now, I am aware that in order to heal, it is imperative that we strive to find the root cause of disease rather than lop off body-parts and call that good medicine. Of course, I'm sure that every doctor who attended to my care back then was well-intentioned and doing his/her best, I just hope we can now start looking at the body more holistically, not organ-by-organ, disease-by-disease.
Final Exams are in the morning! Where's part 2?! :'( P.S. I don't think I would've made it through the last two semesters of A&P without CrashCourse. Thanks guys!!! :)
ThatDudeInTheComments I don’t know but not the same as we pronounce it in Britain, it’s like ‘ka-pyll-airy’ how he pronounces it and over here we say ‘capil-luh-ry’.
I watch CrashCourse videos when beginning a new chapter as a preview. Then I read the chapter for the detailed bits. Finally I re-watch the videos to review before taking the practice tests and doing the study questions. Sometimes, I will watch them a third time,just before taking the chapter test/quiz. Is that too much? ;-)
People im taking Anatomy and Physiology class, and the hardest part of this class is memorizing everything. Whats the secret/Tip that I can do to remembering all the information.
Understand ALL the words - don't worry about remembering them. Just understand. Draw pictures/diagrams. Then visualize what's going on with your own body when you study. Think about where your [body partX] is located and what it does. Touch your own [body part x] and think what it looks like and what it's doing right now]. Get personally involved in the stuff you're studying. What happens when the blood is cut off to that area? etc. Play with the info in your head. And then re-do your notes with DIAGRAMS. Whatever it takes. But cramming is never good for complicated topics. A little at a time. Good luck!!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
THANK YOU SO MUCH!!!!!!!
Thank you so much, that’s awesome!!!! 😊😊
Awesome
When I’m rich Imma start donating. We need to protect Crash course at all cost lol
Notes from the video in case anyone wants them
Lymphatic system
Quitely plays a vital supporting role to both your cardiovascular and immune systems
Maintains homeostasis by eventually returning most of the fluid that has been diverted back into your blood
Three main parts
Lymph- watery solution does not contain red blood cells, which remain in the closed circulatory loop because they are too large to pass through the capillary membrane
Lymphatic vessels help to reabsorb fluid
Lymph nodes- monitor and clean lymph as it filters through
Tonsils, adenoids, thymus, spleen
Lymphatic capillaries
Lymphatic capillaries are all over the body except for bones, bone marrow, teeth, and CNS
Lymphatic capillaries made of loosely overlapping endothelial cells that look like roofing shingles- forming flap-like valves that only open in one direction
When the pressure in the interstitial space becomes greater than the pressure inside the
Lymphatic capillary the flaps push and open and take fluid in to relive the pressure
Once the fluid inside a lymphatic capillary it is now lymph
Ducts
The right lymphatic duct drains all the lymph collected from the upper right area of the torso as well as the right arm and the right sides of the head and thorax and feeds them all into the internal jugular vein
Thoracic duct takes lymph from the rest of the body and dumps it into the subclavian vein
They operate under very low pressure
Have a series of valves that prevent backflow and are helped along by smooth muscles
Edema or swelling that can constrain blood flow
Lymph nodes
Lymph nodes house T cells that directly attack invaders and manage the immune system, b cells that secrete antibodies into the blood, macrophages that eat up foreign substances, and reticular cells that make up the stroma scaffolding network that supports all other cells in lymphoid tissues
Internally each lymph node is divided into distinct cortex and medulla regions: the outer cortex houses dividing B cells, while its deeper areas contain mostly T cells.
Lymphocytes
Lymphocytes are found in and mature in the loose reticular connective tissue that makes up a large part of the nodes and most your other lymphoid organs
The medulla contains both types of lymphocytes
Release macrophages and activate the general immune system
MALTS
Mucosa Associated Lymphoid Tissues (MALTS)- found in mucous membranes around the body, outside the lymphatic vessels
Tonsils some of the largest collections of these tissues which together form a ring around the entrance of the pharynx. Where they can inspect everything you eat and breathe
They Try to remove any pathogens before they enter the GI tract or lungs
Peyer’s Patches- in the distal portion of the small intestine
Appendix - contains a bunch of lymphoid tissue to destroy any bacteria before it can breach the intestinal wall during absorption
You will be my saviour during my time in nursing school! I just need to get used to watching these more often (I only come here when I have exams coming up lol)
Resa Elle same! I have a bioscience exam tomorrow so this is my cram session 👍🏼
Resa, totally! I'm pre-nursing as well, and I do the same. That's actually a really good suggestion. Instead of coming here just to cram, we should review all the BIO series in their entirety in my spare time just to really familiarize myself with the systems and physiology.
BTW, is that Pac?? I love it! Whatcha know about 2pac? lol. It's crazy when I listen to a 2pac song that references the year and I'm like, "OMG, that was over 20yrs ago! How did that happen?!"
OtterBabs I find it difficult to become familiar with this material by only watching videos.
Honestly
LOL this deadass me...
Hank Green is a national treasure. Beat that cancer, buddy.
Could we have a Crash Course series on various diseases that affect the human body?
YES PLEASE!!!
Check out Dr. Robert Morse, I think he has the best understanding on the diseases of the body and the lymphatic system :)
GoingT
Just wanted to say, I find these Crash Course videos incredibly helpful for learning about the immune system. You guys are just so good at really explaining things well and are better at helping me to visualize these concepts than a textbook is. Keep up the good work!
It's good to know that both me and hank were here because we didn't know what the lymphatic system did
Here from Hank's latest video where he watched this to learn from himself!
That was a fantastic presentation. I have been in medicine the majority of my life and that tops any lesson I've ever had! Both informative and as always, fun to watch. Thanks for sharing with the world!
Lauri
Many *commenters say Hank speaks too fast.* That makes it a "Crash Course" & is perfect for review, but if you wanna *_slow it down to soak up info_* that's complex or new to you, *_click the gear in bottom right corner, click speed, click 0.75._* Many know this, but some don't. Hope I helped someone out! Can I get a thumbs up?
Thank you for that but I am looking for the gear but I don't see it. Where exactly is this at? Also, I wonder why we can't reverse it like other clips on UA-cam from other people.
Debbie Wilkins it’s the the three dots in the upright corner 🤗
He sounds drunk
You are the fooking mannnnn!!!!
Turning the captions on can also help :)
Heard the news and had to check up here to remember what was going on! Stay well, Hank!
Love the comparison of the lymphatic system to security! It's funny how a simple analogy can make information that seems overwhelming more relatable and less daunting. Thank you! :-)
As someone who has had Primary Lymphedema for the last 30 years, there is more information in this video on Lymphatics than what most doctors know and understand about the Lymphatic system...Thanks for helpting to educate people on their Lymphatics and why they are so important!
Crash Course, I just want to say to keep the good work! It helps me a lot (especially chemistry), and it'll be a shame if it stops, I appreciate the content you make.
+Jonathan Eleven Thank you! Glad we could help and that you're enjoying it :D
-Nicole
Agreed :)
For someone who found out there Lymphatic system was the reason they have been debilitating sick I appreciate these videos more than anyone will ever know. It took 2 years of neck pain, multiple diagnoses and sick with every thing you could get the whole time. PEOPLE NEED TO REALIZE!!!
Just want to express how much I appreciate these videos. Shoutout to Hank for always keeping it interesting and comical
The host is awesome and the animation makes the course that much more easy to understand as well as keeps your mind from wandering elsewhere.
I'm a nurse, but prior to watching this; the lymphatic system seemed to me like magic. Thank you for bringing it back into the realm of science.
We use your videos for homeschool all the time and they are fantastic! I learn along side my 3 kids! Will donate this month! Thank you!!
real g!!! Im in tears after this whole week studying for my intro bio class. This is the last video I'm watching for my test tomorrow, and it's really helped me! thank you so much!!!!!
I'm brazillian and love this channel, I've learned so much things that I have not seen in my High School, Thank you so much for it 💜
These videos helped me pass Human Anatomy, Microbiology and probably will help me understand the first half of Immunobiology next semester. Thanks Crash course!
when i was little, one of my teachers wore a glove on her hand. I asked her why and she explained that twenty years ago she had cancer and the treatment required that she remove one of her lymph nodes. [insert explanation of lymphatic system] and that since the lymph node wasn't there to let through lymphatic fluid, it flowed down into her hand make it swell without the glove. i would explain this to other kids when i discovered my interest in speaking
Amazing. Like this episode.
EnragedSephiroth sarcastic or?
No, seriously my mind was blown. This is a system I know little to nothing about.
EnragedSephiroth
ok. they don't remove lymph nodes anymore.
+Jeffy Samuel Well, they took one of mine out to make sure I actually had cancer, but it sounds like the rest will be done just with chemo (and maybe radiation).
I'm from Germany and you're my saviour. No one has such amazing animation in german youtube nor the capability to explain.
Thank you Sir!
Seriously giving me the ability to graduate Highschool with these online classes since the COVID-19 caused my schools to close down. Thank you!
This is easily one of the best series anyone could ever use to get a good start in their studies for Anatomy and Physiology I & II. Thank you very much Crash Course
You guys are amazing and are a resource I recommend to all my friends! Please never talk slower, speed is what makes these videos great.
awh, baby lymphocyte at 3:09
I understood more about the lymphatic system in this 9 minute video than in two of my biology teacher's 50 minute classes. Gj Crash course, gj.
I am so inspired, grateful and motivated by Crash Course! Hank, Thought Cafe and all of you hard working, talented individuals who script, design and help deliver this information: You're seriously changing my brain in all the best of ways. Thank you so much, I will gladly contribute to your cause.
I would tell you a joke about salt but Na
you must be fun at parties, plus if its in solution it can discosociate into Na+, but if you add the plus that would ruin the joke
C.0.R.E Tech, my chem prof would dig that one. She'd ALWAYS put up cheesy chem jokes and memes in her slides (where I was introduced to ChemCat). She'd read them aloud, then explain them, which made it even funnier as they often didn't need explanation lol.
C.0.R.E Tech 😂
about sodium.. get it right
, gosh :P
C.0.R.E Tech I’m dead
the "police organs" of the body are definitely the most amazing systems we have in my opinion.
+herpsenderpsen Unlike the TSA however... which make this example really ironic
+herpsenderpsen I like how absolute (enthusiastic?) your immune system is. Fun fact: You have an antibody to destroy the saliva of everyone you have ever kissed on the lips.
Jus10Ed nice, i'll tell that to the next person trying to kiss me :)
***** yes i agree with you, in the human body there is no conflicts between the different motivations of cells and bacteria. They do what nature has always done: adapt to their surroundings. The bacteria does not care if it's in some way "held hostage" by a multi-cellular organism, as long as they survive as a specie. The fact that cells have adapted to live for doing certain "tasks" and in return gain advantages just show how extremely complex nature is, and it's all done without someone ever asking an organism what it would prefer.
ķnj
These videos are helping me through nursing school. THANK YOU!!!
I listen BEFORE my teachers lecture and i feel like i can grasp things so much quicker. THANK YOU
"And that's what we're going to be talking about for the rest of this series."
Wait, what?! It's nearly over? Awwwwww.
+AusSP Sadly, yes - there will be 47 episodes in total, so the end is fast approaching. But the good news is that you can always re-watch these episodes *and* we're going to start a new course in its place!
-Nicole
+CrashCourse Crash Course Physics!?!!?!?
+Lawrence Tider didn't reach 40,000 yet
good work
+CrashCourse I thought there were going to be 52...
Lymphatic System - Great Explaination (y)
+Pure Madness
A representative told me sometimes that happens if your liability
is exactly equal to the money in your account. Try reducing your backer's stake
by 1p, it should work and won't make much difference.
I’ve always seen match betting on these type of guides but never really looked into it but evidently you can make a fair bit.
+Pure Madness It might be worth your while contacting them to clarify things. I’ve also noticed a huge drop in the amount
awesome man !
+Pure Madness
. Matched betting means that you win whatever the outcome...
Remember you only lose the liability and not the stake amount if you lose on
Betfair.
Am I the only one who gets distracted by moving objects and the slushing liquids on the desk?
Danii Koehler hahah sorry. They jiggle around with his hand movements
Kassidar I get what you're saying, but I really don't think I have autism. I get daily chronic migraine so my attention isn't always the best, especially if I'm in the postdrome stage of one.
+Alyssa Sipe i noticed it the first time i saw crash course lol, it is distracting
+Kassidar lol that's kind of a big jump. poor attention is a symptom of a million different things, not just autism.
^^
I love how before I watched this series I thought that your spleen was useless, I can learn so much from you hank
This is my favorite system :) my anatomy instructor called it the shadow of the cardiovascular system. Before that, I took physiology and didn't think much of it, I only thought that it handled the fats from the GI tract. I've since learned so much more by taking immunology and hope other people grow to like it as much as I do.
I have Klipple Trenaunay Weber Syndrome and Lymphedema, a malformation in my lymphatic system which caused me to be born with a swollen right light which eventually worsened as I got older to the point where my toes started discharging a lot of lymphatic fluid and blood non-stop along with a lot of pain and it's still something I have to deal with today at 27. Throughout my life my doctors never properly explained to me what I had so I had to research everything for myself. Actually, my doctors SUCKED! They told me to do things that actually made my condition worse since they didn't really know how to treat it themselves and didn't think to refer me to other doctors that might know how to help me. I'm managing it the best I can now but I want to learn more information about my condition so I can manage it more effectively. Thanks for uploading this. I'm gonna watch all of these videos.
I have been looking at a bunch of videos on the Lymphatic System. And your video is the most informative one I have seen. Thank you!
4:05 I love how the capillaries dance!
You saved me during my high school biology classes!
This is just tremendous edutainment. Crash course rocks! I see many say the talk is too fast. No! The speed of the talk is wonderful. It's faster than reading, thanks to the marvelous graphics. (Just stop if you miss something, back up a touch, and you'll inevitably find a word you don't know the definition of. Look it up and then this speed is better than slower.) And one can find the short segment one seeks very readily. Hats off to Crash Course!
As someone with Lymphedema, I greatly appreciate this video. Thanks Hank!
I subbed, the poor man’s donation
This guy is just amazing! Thank you for this Crash Course you completely Rock!!!!
I am watching these from 2019 and it always cleared all my problems
I absolutely love Crash Course! I’ve learned so much from you and have had fun doing it! The humorous way that you present the materials is such a refreshing, stress relieving way to approach learning. Thank you guys at Crash course y’all rock!!! Please keep the videos coming....
You're amazing at what you do. Thanks for breaking the mold of typical educators.
I wish you guys would come up with a series for Pharmacology. It would be most appreciated!
The lymphatic system refuses to store in my brain for exams wah! Thank you crash course for helping make it a little easier! 👏
there is people that thanks this guy for helping them pass college or university and there me the mf who is learnign this for 7th grade 💀☠
The Irony: Crash course gives me more knowledge than those full course out there. Hehe
I've watched Crash Course all through high school and into my higher education.. Hasn't let me down yet!
Your explanation is extreme sir
Im a brazilian student, and omg! Even for me that dont have a fluent vocabulary could understand the class. This helped me better than a bunch of pdfs and old videos that i have. Thank u a lot.
People say you talk too fast. But i think you should never slow down. I always sleep in slow talking lectures and sometimes have to put the speed at 1.25 but crash course you have done it for me. Thanks a bunch
BRAVO! I enjoyed Hank's unsung lymphatic system immensely, a great refresher course and learning tool to pull together stuff I had and have yet to learn! Excellent job!
Thank you so much for making my work easy..................... I just love your videos and there is fun in learning with your videos being provided :) Cheers !
anishma parajuli Hey
does he read off a prompter or does he just really know his shit
+thesinaclwon total promter. fast reading and quick cuts are a staple of what you can do with a prompter
+emailchrismoll good point but I think it's a mix of prompter and nurdism, he is very well spoken and projects well.
+thesinaclwon very well spoken and smart indeed. btw it is easy to make a diy teleprompter. i actually just made one this weekend haha
+thesinaclwon He *does* know this material quite well, but he uses a teleprompter. The scripts are written and edited by the brilliant Katie Yale and Blake DePastino.
-Nicole
+CrashCourse the official answer
Watching these videos while on treadmill because, study has no breaks ;)
Finally the lymphatic system! My biology exam is in a week's time and this is going to help me so much! Thank you Crash Course team!
Seriously this guy is Amazing.. I love how clear he is and how his animation makes it helpful to understand. GREAT STUFFF MON
FUUUUUN!! I needed this review, it's been over 20 years since college and I have had a lot of patients with lymph issues lately. Thank you!
I AM SHOOK
*our appendix is not useless?*
i actually learn from youtube more than i do from school *ugh*
is there any reason as to why the right half of the lymphatic system only takes up 1/4 of the system while the left half takes up the other 3/4?
Im guessing something to do with the heart and blood flow being on the left since it drains back to there.
hey Crash Course, please make a course on Biotechnology
My lymphatic system is almost as much of a failure as I was in my second semester of Astronomy in college. Good to have a chance to learn all about the failure!
This man is an international hero/lifesaver and I salute him.
Security checkpoints...I love that
These videos are great for homeschoolers like myself. Thank you so much for non-crappy education!!!
why does half of my diploma consist of watching this channel? Not complaining. Thanks hank
Just one correction : the drainage of the right lymphatic duct is to the right SUBCLAVIAN artery, not jugular. TY for the video :)
TheCheese9 Thank you, I thought I was going crazy... I was frantically searching for a comment that corrected that.
he means vein
Honestly, there is so much variation in the human body that I can tell you without a doubt that the body's vessels are not textbook perfect. So whether it's R subclavian vein or R internal jugular vein, the right thoracic duct drains into that general area because both (subclavian and inter. jug.) drain into the R brachiocephalic vein --> superior vena cava --> R atrium.
Source: Dissected and learned from 4 different human cadavers.
I like how there's a Strong Mad on his desk full of science things :)
4:54 , I'll ignore the fact that they both dump into the junction between the respective internal jugular and subclavian veins. The arrow pointing to the subclavian vein is pointing to the superior vena cava not the subclavian... subclavian means below the clavicle.. not the part thats about to enter the heart.
just paused the video to say thank you so much for making these videos! my Bio teacher is so boring and hard to understand so I'm watching your videos to help me understand my notes and prepare for the exam. thank you!
Thank you for this video...You actually made learning about the Lymphatic System pleasant as it could be...Much appreciated!!!
Your videos are the best - fun, informative, and lots of pictures.
Excellent presentation. But you forgot to mention how where and how the lymphatic system dumps its waste and how a congested lympathic system is the main cause of almost every chronic, "incurable" disease.
Me being happy that hank mentions seattle any other Washington residents here?
I am a lymphatic drainage therapist... this will be an excellent way for me to check how much I remember of the theory. good job so far.
Now that I understand tonsils and their function, I'm so sad that I had mine removed when I was a teenager, due to experiencing recurrent tonsilitis. Now, I am aware that in order to heal, it is imperative that we strive to find the root cause of disease rather than lop off body-parts and call that good medicine. Of course, I'm sure that every doctor who attended to my care back then was well-intentioned and doing his/her best, I just hope we can now start looking at the body more holistically, not organ-by-organ, disease-by-disease.
Thanks for🙏💕🙏💕 the great help 🖤
Hank came to rescue me from the confusing uni lectures!
Thank you for your wonderful series. I am using this series in my class to reinforce the immune system. My students love your work!
I learned more about this in the 2 minute intro then my whole 40 minute bio period on this. Go our school system!
***** This was a praticulary bad lesson
Blood terrifies me but the little squishy characters made this video easier to watch!
piczohun I love blood, as long as it's not coming from me
Final Exams are in the morning! Where's part 2?! :'(
P.S. I don't think I would've made it through the last two semesters of A&P without CrashCourse. Thanks guys!!! :)
Okay, I watch these videos when I'm struggling in bio but when I hear you say capillaries I can't concentrate.
Me too!! I had to go back because I kept thinking about how wrong it sounds
Lily James same, some (most) American accents over-pronounce ridiculously.
what does it sound like?
ThatDudeInTheComments I don’t know but not the same as we pronounce it in Britain, it’s like ‘ka-pyll-airy’ how he pronounces it and over here we say ‘capil-luh-ry’.
Actually, now I rehear he says, ‘ka-pull-aeries’ and we say ‘ca-pill-luh-ries ’.
well thanks for saving me the morning of my exam :) appreciate it
are u a teacher? ur vids have helped me for the last 3 years in classes...thanks!!
cheers and thanks to hank while he still made lots of CC videos, and for educating us on tons of material. and also for sci show and vlogbrothers.
Really appreciated, Hank! Haven't IGNORED the importance of taking care of my lymph system since graduating nursing school in 93'...
I just learned this in class last week! Thanks for the refresher Hank, made it a lot easier to understand. :D
U bcme a doc now
One of the best youtube videos I've ever seen. Thanks.
I watch CrashCourse videos when beginning a new chapter as a preview. Then I read the chapter for the detailed bits. Finally I re-watch the videos to review before taking the practice tests and doing the study questions. Sometimes, I will watch them a third time,just before taking the chapter test/quiz. Is that too much? ;-)
Dunno why I watch these guys vids, every time I leave more confused than before, so many concepts mixed into one spoken at the speed of light
People im taking Anatomy and Physiology class, and the hardest part of this class is memorizing everything. Whats the secret/Tip that I can do to remembering all the information.
Don't cram. Look at the material every day for as long as you can stand. It will slowly begin to make sense the more you look at it.
Understand ALL the words - don't worry about remembering them. Just understand. Draw pictures/diagrams. Then visualize what's going on with your own body when you study. Think about where your [body partX] is located and what it does. Touch your own [body part x] and think what it looks like and what it's doing right now]. Get personally involved in the stuff you're studying. What happens when the blood is cut off to that area? etc. Play with the info in your head. And then re-do your notes with DIAGRAMS. Whatever it takes. But cramming is never good for complicated topics. A little at a time. Good luck!!
Spacing effect!