Reproductive System, Part 4 - Pregnancy & Development: Crash Course Anatomy & Physiology #43

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  • Опубліковано 3 лют 2025

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  • @crashcourse
    @crashcourse  4 роки тому +86

    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

    • @user-yb3zs6lf3l
      @user-yb3zs6lf3l 4 роки тому +2

      CrashCourse AMAZING MY FINAL IS TOMORROW THIS COULD NOT HAVE BEEN BETTER TIMING

  • @annalloyd4418
    @annalloyd4418 2 роки тому +305

    The way that Hank Green and John Green are the back bone of the American public school system is UNREAL. Thank you, from the bottom of my heart. The impact you and your brother have made on the world is unreal.

  • @stephimarie317
    @stephimarie317 8 років тому +960

    These videos are LIFE SAVERS for finals

  • @lizzysilvers2119
    @lizzysilvers2119 5 років тому +202

    Its nearly 1am on the day of my A+P 2 final... It's a 4-year-old video and still reviewed everything I needed to review for this concept... I'm a college student. Crash Course has always been a blessing for finals!!!!

    • @macitotom
      @macitotom 5 років тому +7

      You Know,I never find what he's saying in my textbook....but I still watch it anyway, because it's THAT GOOD
      I'm a 3rd year medical student,and still watch his videos because Everytime I do,I learn something new....he... along ninja science nerd....made me feel that I actually understand medicine somehow....
      Good luck with your exams by the way 👍👍

  • @EntrE01
    @EntrE01 9 років тому +343

    what do you mean you don't know me hank?! We've shared all these great times together! Like, remember when I watched all your videos? Hell that was pretty sweet now wasn't it. Don't you say you don't know me, it hurts.

  • @therealbluekoopa21
    @therealbluekoopa21 8 років тому +384

    Mothers are amazing! They have to go through temporary pain for a lifetime of happiness. Thank you mothers!

    • @GingeredHonii
      @GingeredHonii 8 років тому +7

      sometimes i feel bad for my mommy ;w;, she had to go through the pain with me for 10 months.

    • @agirlwithdreams15
      @agirlwithdreams15 8 років тому +39

      TheCraftingCookie lol at you thinking motherhood is happiness

    • @summerbella-yi4cw
      @summerbella-yi4cw 8 років тому

      TheCraftingCookie I wish I still had mines... :(

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому +23

      It's not exactly temporary pain. Being a parent offers a lot of wear-and-tear on the body, especially when the child is in infancy. There's a lot of isometric-like exercise going on with constantly lifting and carrying someone that goes from ~5-9lbs to ~12-16lbs in just six months.

    • @jojo.s_bekaar_adventures
      @jojo.s_bekaar_adventures 5 років тому

      but you're gay

  • @flynnkay
    @flynnkay 9 років тому +350

    This youtube channel is amazing. it teaches children on youtube (which is where ALL kids are) about science and space etc. which is the real and good interesting stuff in life!

    • @zachruhl6008
      @zachruhl6008 9 років тому +1

      +GreenShot They also have to more kiddish version.

    • @zachruhl6008
      @zachruhl6008 9 років тому

      ***** Well they never had a reason too.

    • @TheReaper569
      @TheReaper569 9 років тому +3

      Im not s child but i watch it all. My county lacks reproduction and sex ed because.. Religion.

    • @zachruhl6008
      @zachruhl6008 9 років тому

      Hakan Karaağaç what country do you come from?

    • @TheReaper569
      @TheReaper569 9 років тому

      Turkey. Formally secular but going more and more religious conservative by the leadership. Im the last generation that finished highschool with reproduction lessons in humans in biology.

  • @zoryfahringer210
    @zoryfahringer210 9 років тому +1245

    is it sad that this channel has taught me more than my science teacher had? 😂

    • @alyssamsipe9123
      @alyssamsipe9123 9 років тому +36

      o be honest, yes. There's so much shame on sex and reproduction in school.

    • @EvilNeonETC
      @EvilNeonETC 9 років тому +5

      i had health class, but these videos are much better at explaining things, even though my teacher was highly entertaining.

    • @joergsprachsprechen8214
      @joergsprachsprechen8214 9 років тому +1

      +EvilNeon * entertaining *

    • @EvilNeonETC
      @EvilNeonETC 9 років тому +1

      +Enzo Ciarlini no puns, he literally was a great teacher.

    • @damonsalvatore269
      @damonsalvatore269 7 років тому

      Zory Fahringer why do u think I'm here? LOL 😂

  • @furzekake1
    @furzekake1 9 років тому +189

    All this pain and tears from all mothers in the world has created us. Thanks to all mommys in the world! With your altruistic behaviour we can live.

    • @wehavnoidea
      @wehavnoidea 9 років тому +19

      +Nathan Pattison Some women aren't ready to have babies. No reason to shame them for not being ready to go through this long, difficult process.

    • @mightyNosewings
      @mightyNosewings 9 років тому +4

      +Nathan Pattison The human population is going to hit 9 billion this century (assuming all goes well, and hopefully it will peak there).

    • @spindash64
      @spindash64 9 років тому +3

      +Emily Ericson I'm not shaming them, I'm shaming us for telling them it's ok to murder another human being just because that human being can't speak for his or herself. I feel anger, yes, but I don't hate anyone. A person's a person, no matter how small

    • @wehavnoidea
      @wehavnoidea 9 років тому +25

      +spindash64 We have never been told that it's okay. Women are mocked, shamed, and humiliated for simply not being at a point in their life where they are able to give birth to a baby. And by that logic, the millions of eggs inside my body right now are already people. A zygote is a zygote, not a person. Of course it's not an easy decision, but it's a decision that women should have the right to make.

    • @wehavnoidea
      @wehavnoidea 9 років тому +14

      +Nathan Pattison I'm sorry, but would you, as a man, be willing to put your life on hold for nine months for a child that you don't even want? To experience all of the horrible symptoms told about in the above video, to have to switch your entire life around? No. You wouldn't. What you have to say about what a woman does with her body does not matter, because you are not a woman. Just like you can't force a person to donate blood or organs against their will, you most certainly can't force a woman to go through this life altering experience because you believe a fertilized egg is a person.

  • @Dymphna1990
    @Dymphna1990 8 років тому +13

    I think it would be cool to have a crash course "What to expect" series. Lots of pregnancy sites have week by week calendars where they tell you what's up with baby. But Crash Course is so fun, I think it would be cool to see what they had to say about the 40 weeks of Pregnancy!

  • @strivingwithsteph1649
    @strivingwithsteph1649 6 років тому +221

    "Learn how you're gonna put the little thing through college" 😂

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому +10

      Children aren't going to need college in 18 years from now with all this free education online.

    • @saluthigh1676
      @saluthigh1676 4 роки тому +4

      @@-._.-KRiS-._.- They will still need certificate and do you think online learning is good enough. It would be if we all follow some good lecturers but when my lect try to make a vid LOL

  • @abdulaleem712
    @abdulaleem712 7 років тому +13

    hank is so proud of us for growing up. me too hank, me too.

  • @AlexTheMary
    @AlexTheMary 9 років тому +755

    I shall save this video so that everytime I have baby fever I can rewatch this and be reminded as to why that is a bad idea.

    • @alexisreyes4179
      @alexisreyes4179 6 років тому +6

      Right exactly

    • @HERO_DREAMER
      @HERO_DREAMER 6 років тому

      ?

    • @bravanator551
      @bravanator551 6 років тому +32

      Girl I got it bad too, so I just watch as many scary delivery videos as possible & pay close attention to how evil the little things can potentially be at 3 & that helps me remember to wait till I have a degree before becoming a mother.

    • @gremistaoloco8881
      @gremistaoloco8881 5 років тому +2

      Of course you shall save it, you are American. and what Americans know best then put a baby in the world every nine months???

    • @bravanator551
      @bravanator551 5 років тому +29

      Gremistao Loco actually America has a slower repopulation rate than many other countries. Not sure where you got the idea from that we pop out babies on a regular basis but that’s really not how it is here.

  • @ThatAnnoyingBird
    @ThatAnnoyingBird 9 років тому +480

    0:00 "Who are ya callin' Pinhead?"

  • @elizabethgodwin7679
    @elizabethgodwin7679 11 днів тому

    I'm pregnant for the first time and I'm just so happy that there's a crash course video to help me out. Complexity videos are always clear, fun, and trustworthy

  • @toniaa-y3559
    @toniaa-y3559 6 років тому +6

    Ok seriously Hanks first minute before the theme song almost always cracks me up

  • @michellesasser2897
    @michellesasser2897 8 років тому +19

    Happy Mother's Day! And good luck with everyone on their AP biology exam tomorrow!!

  • @KJHutchinsMusic
    @KJHutchinsMusic 7 років тому +5

    Please make a comprehensive Crash Course Sex Ed. Lots of people really need it.

  • @taylorbarnett1199
    @taylorbarnett1199 5 років тому +31

    I have had 2 vaginal births can’t wait for my next little buddy. I love being a mom

  • @yasminakatebi9265
    @yasminakatebi9265 8 років тому +62

    Im happy,finally hearing a man to say:i really don't know how emotionally ladies bare someone,a whole new person growing in them.
    Yup,happy to hear someone respecting women..
    With all respect to hank green for the sake of the respect he gave females with this very sentence.

  • @yolandasandoval1352
    @yolandasandoval1352 8 років тому +20

    The reproductive episodes have been hilarious, and of course informative :)
    Thanks for all your great videos, you have definitely helped me out a lot in my anatomy class!
    Final is tomorrow!

  • @zerogravity245
    @zerogravity245 9 років тому +226

    "You don't make a car by carving it from a single chunk of metal..."
    I dunno... Apple might...

  • @alyssamsipe9123
    @alyssamsipe9123 9 років тому +1

    I'm currently in Child Development right now, so all this solidifies what I've learned already and then some

  • @BunnyFett
    @BunnyFett 9 років тому +17

    I still love how he credits everyone at the end of each video.

  • @thoryne
    @thoryne 9 років тому +280

    0:21 was that Shia LaBeouf clapping? :D

    • @crashcourse
      @crashcourse  9 років тому +69

      +Thoryne Sure was! Good catch :D
      -Nicole

    • @dbartholemewfox
      @dbartholemewfox 9 років тому +3

      +Thoryne Weird that they didn't animate Orson Wells as Citizen Kane clapping...

    • @Redlin5
      @Redlin5 9 років тому +1

      +Thoryne I saw it too. :)

    • @kAshley92
      @kAshley92 9 років тому +5

      +Thoryne I literally laughed out loud when I saw the cartoon clapping because I had read your comment beforehand. That was a good one.

    • @thoryne
      @thoryne 9 років тому

      +kAshley92 I made someone laugh? Good, it means that my job here is done :P Also... I'm watching the original Shia video over and over again, where this clapping was taken from >.> :D

  • @car-azy_tm
    @car-azy_tm 9 років тому +56

    Finally. An answer to the age old question: How is babby formed?

  • @sailingthesouls
    @sailingthesouls 8 років тому +7

    These videos are extremely helpful! He keeps them interesting and explains complex topics so any level can understand them!

  • @ignatiusjoseph1676
    @ignatiusjoseph1676 7 років тому +1

    THESE GUYS DESERVE TO BE MILLIONAIRES MABY MORE THEY HELPED ME SO MUCH

  • @chillsahoy2640
    @chillsahoy2640 9 років тому +85

    It sounds like the fetus and the mother are having a pleasant biochemical conversation but consider this: the fetus can make a special kind of hemoglobin that has a higher affinity for oxygen than adult hemoglobin, which means that the fetus is pretty much wrenching oxygen away from the mother's hemoglobin. Still, the reason it evolved is because it works. Go biology!

  • @venkatramancv812
    @venkatramancv812 8 років тому +6

    Thank you so much. Your human reproduction videos are excellent. I am glad you don't feel awkward talking about it because your videos really helped me to understand it.

  • @TheJoyannika
    @TheJoyannika 7 років тому +596

    I'm 7 years old but I want to be a good doctor

    • @Scerttle
      @Scerttle 7 років тому +177

      If you're already watching stuff like this, you're well on track. Keep it up.

    • @lucianalove9492
      @lucianalove9492 7 років тому +109

      Omg, kid you can spell better than most adults, it's a lot of work to be a doctor, but my advice is to study and never give up! Good luck!

    • @deardarlingdollies5851
      @deardarlingdollies5851 6 років тому +63

      My advice is to start looking at chemistry videos now and get good at chemistry as well. You're off to a good start. Good luck!

    • @blugaledoh2669
      @blugaledoh2669 6 років тому +13

      Luciana Love Your comment just make me feel sad, is it true.

    • @victori2335
      @victori2335 6 років тому +13

      Keep it up!! You´ll have a long journey but it will be worth it!

  • @arushramteke730
    @arushramteke730 7 років тому +59

    "After that, all you have to worry about is how to put the little thing through college" 😂😂😂😂😂😂😂

  • @rjfaber1991
    @rjfaber1991 9 років тому +52

    Or, in Gaius Julius Caesar's case: "It involves a system of hormonal signals that, as sophisticated as they are, get interpreted by the very earliest human cells into two simple instructions: Divide, and Conquer."

    • @blackmesa232323
      @blackmesa232323 9 років тому +27

      That applies more to cancer than fetuses.

    • @MakeMeThinkAgain
      @MakeMeThinkAgain 9 років тому +5

      +Robert Faber I thought you were headed toward Caesarean Section. It would be interesting to do another episode on all the things that can go wrong during this process.

  • @carno0729
    @carno0729 Рік тому

    I watch the CC video before I watch my professor's lecture videos. They are THAT GOOD! Thank you for helping me ace A&P1&2!!!

  • @M_Chen333
    @M_Chen333 9 років тому +30

    Hank must've gone through a lot of... LABOR!!!!! making this episode!!!
    HA HA HA HA :) :) :) :)

  • @liliumjade
    @liliumjade 6 років тому +18

    This is what I'm gonna show my son when he asks me where babies come from.

  • @K.S.Khunkhao
    @K.S.Khunkhao 9 років тому +96

    Superbly done! *Slow clap*

  • @leanejoubert8517
    @leanejoubert8517 5 років тому +5

    Me writing a test on embryology: I bet this video will help
    Hank: So we won't focus on that

  • @TheNoa36
    @TheNoa36 9 років тому +45

    I laughed out loud when he said the baby will combine aleles with someone

  • @island-wind
    @island-wind 9 років тому +19

    That angler fish on your desk,where are it's eyes? :3

    • @GingeredHonii
      @GingeredHonii 8 років тому +4

      your profile picture is messing with me

    • @benitapitt1199
      @benitapitt1199 7 років тому

      i thought it was moving haha

    • @oTimbo98
      @oTimbo98 7 років тому

      Alex Friesen its your mind making it look like its moving threw your eyes

  • @StevenEveral
    @StevenEveral 9 років тому +76

    And that is literally how all of us got here.

  • @chiralhome
    @chiralhome 7 років тому

    i like how Thought Cafe did the illustrations. . . .
    They described it well enough and still kept it tasteful and entertaining...
    less is sometimes more

  • @annidee
    @annidee 9 років тому +63

    Isn't the head of a pin the non-pointy side? As opposed to the point of a pin? 😐

    • @Plystire
      @Plystire 9 років тому +18

      +anni dee if you zoom in far enough -- they're *all* non-pointy sides. ;)

    • @Quotenbrtchen
      @Quotenbrtchen 9 років тому +6

      +Mohammed Samiwala Not quite, electron orbitals sometimes have freaky shapes that are not round at all.

    • @gato815
      @gato815 9 років тому +1

      +Mohammed Samiwala You can't zoom in into the molecular level.

    • @RanaKamikaze
      @RanaKamikaze 9 років тому

      +anni dee well you were also that size

    • @rynsawyer4185
      @rynsawyer4185 9 років тому

      +anni dee that's what I thought...

  • @username975312468
    @username975312468 9 років тому

    Sorry to call you out, CrashCourse, and I know this from personal experience helping my lovely wife through delivery, the baby doesn't come out smoothly with an adorable "ShooooooOOOOOOP!" sound, though I very much wish it had. Also, I feel for that animated new mommy. That animated baby's head was MASSIVE!

    • @killerbee2562
      @killerbee2562 9 років тому +1

      +joe mastropiero Some women it does and some women would die trying to giving birth with out modern medicine.

    • @LikelyToBeEatenByAGrue
      @LikelyToBeEatenByAGrue 9 років тому

      did you want that part of the video to be three hours long and fill of screaming? me neither.

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому

      My baby literally slipped out after the nurse told me to do two practice pushes. On the 2nd push, my baby's head started crowning. While they tried to get my OB in the room for delivery, Baby just slipped right out even though I was trying to keep her from coming out because they told me they weren't allowed to deliver w/o a doctor present.

  • @alliegriffin1274
    @alliegriffin1274 4 роки тому +1

    I was introduced to your videos last semester in A&P1 and have watched you since! But this semester I was introduced to your history lessons AND I saw you in some art assignment videos! You've changed a lot in the years! Good for you, can't wait to see what you teach next ;)

  • @edwardtempelii162
    @edwardtempelii162 7 років тому +2

    Thank you so much Crash Course! The way you explain things help me understand what the textbook is trying to explain. I have enjoyed learning A&P very much. Sometimes this course is down right tough, confusing, and hard to understand. Thank you for helping me make my light build came on! Those realization moments have happened many times Crash Course. I watch the videos after I have read the textbook because the host talks extremely quick and uses big words that are going to be used to explain steps in physiological processes. I guess that's why they called A&P. My thanks and best wishes go out to you.

  • @srehaviswanathan1434
    @srehaviswanathan1434 4 роки тому +2

    I love my mum a whole lot more than I already did now :)

  • @merryissac8265
    @merryissac8265 8 років тому +3

    Great teaching. I never felt more interested. Thank you.

  • @kanchanaashok9094
    @kanchanaashok9094 7 років тому +4

    i like the way he teaches. and i wish he was my bio teacher.

  • @ProggresiveArt
    @ProggresiveArt 9 років тому

    Next week i have an oral exam on gynecology and obstetrics, and i need this info, its not like i dont know this, but when i see these vids i can memorize the facts a lot better and longer so... . Thank you for making the material so vivid and easy :)

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому

      Please don't induce your patients unnecessarily, especially if it's just because you want to deliver the baby a week early because you're going on vacation the week it's supposed to be born. That is all I ask of a future obstetrician.

  • @laurellion3567
    @laurellion3567 6 років тому +1

    I took my A&P2 final today and I miss Hank already.

  • @graceolowu699
    @graceolowu699 Рік тому +1

    I love how you make fun and easy to comprehend.

  • @naumanlal1548
    @naumanlal1548 6 років тому

    I watched ur videos while preparing for my medical college admission test and now when I finally got admission (thank God) I’m still watching ur videos. ✌🏻😍

  • @vaishnaviramakrishna265
    @vaishnaviramakrishna265 7 років тому +3

    That's what I need for my finals!! thanks 😘....love this channel!! keep it up!!

  • @rowanreads1118
    @rowanreads1118 6 років тому

    i have a science test tomorrow, thanks so much dude you’re a lifesaver!

  • @rita_fcortez
    @rita_fcortez 9 років тому +1

    I have an exam today about that! that helped me A LOT!

  • @spr35441
    @spr35441 9 років тому +4

    As a geology and geography major, all of this biology talk kinda freaks me out

  • @victorious4701
    @victorious4701 6 років тому

    You are Gods! Seriously your channel thought me more than 10 encyclopedias worth of information! And you deliver the most important stuff if the subjects of the videos so than anyone can understand. No matter of they're a nerd or a regular!
    Thanks for keeping learning fun and awesome for me and everybody else!
    And, as always, DFTBA!

    • @victorious4701
      @victorious4701 6 років тому

      And I think that this channel is waaaaay more underrated than it should be! I mean you guys deserve to be shown to EVERY school there is and yet you have only what, 7mil?! I'm so grateful that I found this channel and that I was able to share it to more than 100 people. Keep doing your best!

  • @RNH2O
    @RNH2O 8 років тому +2

    Hank is awesome 👏🏼

  • @Alex-uf3lh
    @Alex-uf3lh 5 років тому +9

    I'm watching this while on Mother's Day

  • @yunadimon7294
    @yunadimon7294 8 місяців тому

    I enjoyed with all those excellent explanations.
    Thank you from the bottom of my heart, Crash Course.

  • @erikpinochet7655
    @erikpinochet7655 9 років тому

    Loving the episode!
    Not to be a pain in the ass, some things are wrong: the two cell stage is reached approximately 30 hours after fetilization. four-cell stage at 40 hours, and 12 to 16-cell stage is reached after 3 days and it is this 16-cell stage that is called morula.
    Besides this, good job guys!

  • @reymystorioable
    @reymystorioable 8 років тому +1

    Your videos should get a lot more of attention then they do. Keep up the good work!

  • @Qermaq
    @Qermaq 9 років тому

    1:16 That's the point of the pin. The head is the blunt end.

  • @loisbaker6922
    @loisbaker6922 5 років тому

    these videos have been sooo helpful because i have a science test on this subject and i didn’t know how to revise and then i found this and it was sooo helpful thank you

  • @coffincoffee1
    @coffincoffee1 8 років тому +1

    These videos have been very helpful for me! However, maybe you can add to it by doing something about preventative birth control and contraception? Maybe about the different options available and how to prevent unwanted pregnancies as well as std prevention and how it works? I think that would really complete the sex education you have going on here.

  • @thenerdyartist3324
    @thenerdyartist3324 8 років тому +73

    So scared of pregnancy atm😂

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому +2

      Pregnancy is fun in the 3rd trimester. Getting past the 1st trimester is the most difficult. Just know that when people say 'contractions', that means that you will receive a pain exactly like your period cramps, only more intense.

  • @georgetello2203
    @georgetello2203 9 років тому +1

    THAT WAS AWESOME! I NEVER STOP LEARNING!

  • @user-yb3zs6lf3l
    @user-yb3zs6lf3l 4 роки тому +1

    please make a video series dedicated to microbiology !!!!

  • @Toocoolforschool573
    @Toocoolforschool573 7 років тому

    Theses videos should be in schools

  • @tinkerelsa2882
    @tinkerelsa2882 6 років тому +1

    Let me tell u man ! U r simply awsome ...and ur videos ...i just got addicted to them 😄

  • @regitarahmamaharatri3410
    @regitarahmamaharatri3410 6 років тому +1

    It helps me so much to understand my subject class, thank you CC!

  • @shade7405
    @shade7405 6 років тому +1

    this is sooo helpful! I love this channel! I recommend it to all my classmates

  • @shaumikmishra2792
    @shaumikmishra2792 5 років тому +1

    Please post a video on human regeneration. Please hank please.

  • @amanagarwal478
    @amanagarwal478 8 років тому

    pls add a video for gastrulation as it is the most hard part

  • @robm6726
    @robm6726 5 років тому

    almost done, just have A and P 2 lab for the fall semester, taking lecture over the summer lol.

  • @peternouwen
    @peternouwen 9 років тому

    Excellent episode, especially the last remark after the summary…

  • @tanyamedrano184
    @tanyamedrano184 4 роки тому

    Yayyy WE'RE DONE WITH AP2 CONGRATULATION EVERYONE YALL DID IT WOOT WOOT

  • @SASRosco03
    @SASRosco03 9 років тому +1

    Awesome Video! Please make a math course.

  • @doodlecat7783
    @doodlecat7783 7 років тому +1

    So amazing cant wait to have my own child....... when I'm much much older

  • @chiralhome
    @chiralhome 7 років тому

    you're the best hank

  • @jojowiewerjojo
    @jojowiewerjojo 9 років тому +1

    what do you do when before the video there is an hour long "pre roll"?

  • @sagirkhankhan6099
    @sagirkhankhan6099 7 років тому

    These videos are life

  • @raiden6318
    @raiden6318 8 років тому

    You've help me pass my A&P Essential class. Thank you. 😇

  • @Animbating
    @Animbating 9 років тому

    You guys made the baby's head so freaking large in that animation, jeeeeeeeeeez, made my ovaries pucker.

  • @spartanhead8131
    @spartanhead8131 5 років тому +2

    Who remembers when thought Cafe was called thought bubble. Thee good old days.

  • @KAST96
    @KAST96 5 років тому

    Hank I need an embryonic differentiation video!

  • @chiangui24
    @chiangui24 9 років тому

    that animation was amazing

  • @sallycrow1494
    @sallycrow1494 8 років тому

    Starting to feel prepped for my exam, this has helped a lot!

  • @MadHatPlay
    @MadHatPlay 9 років тому +1

    Hello! I'm from Astana.Kazakhstan. Did watch your videos and found them very interesting and useful. My team want to translate your videos to Kazakh and uploade them on youtube , so our students could watch them in native language . Thank you very much!
    Sincerely, Askhat Rakhym.

    • @iamrockness
      @iamrockness 9 років тому +1

      Send them a business email or direct UA-cam message. They'll be more likely to see your request that way. Good luck!

  • @someone-ub7hg
    @someone-ub7hg 8 років тому

    Thanks a lot. Your videos are amazing and interesting. I watch them after studying each system in my textbook. They are more beneficial than the silent pictures in the book. Thank you!

  • @cindyoneill5800
    @cindyoneill5800 7 років тому +1

    AWESOME!!

  • @987werther
    @987werther 9 років тому

    New Crash course video!!!

  • @melissali7423
    @melissali7423 7 років тому +1

    it's amazing we have the freedom to just create a human, you need a permit to build on to your property, but to create life, go for it!

    • @-._.-KRiS-._.-
      @-._.-KRiS-._.- 5 років тому

      Until they start regulating all bodily autonomy, they can't make giving birth illegal.

  • @VoidHalo
    @VoidHalo 7 років тому +1

    The head of a pin is the flat part, not the pointy part. :)

  • @zarlsx2216
    @zarlsx2216 8 років тому

    Thanks for all the videos! Youre getting me through school

  • @ibitsola
    @ibitsola 7 років тому

    Thank you CrashCourse

  • @tuckervanburen8314
    @tuckervanburen8314 6 років тому

    Hi there, hopefully someone can clear this up. From my understanding, hCG is an endocrine process (meaning it travels through the blood stream) this is also how pregnancy tests work, as hCG is filtered through the blood it also goes through the kidney for excretion in the urine, thus, pee on the stick, the stick recognizes hCG and indicates pregnancy. Does it talk to the corpus luteum through endocrine or is it more of a paracrine automation? Thanks

  • @mohamad.hamdihamdi9475
    @mohamad.hamdihamdi9475 5 років тому

    You are just a legend

  • @maricis96
    @maricis96 2 роки тому

    I love your content. It has been a great help with my A & P courses.