Great great job! I have a biology degree and am doing some studying for an "invertebrate biology" class that's I'm taking as a refresher, this was perfect! Really, really well done. All the key points really fast, fully explained. I actually never had a proper explanation of the purpose/exact location of the coelom as I just received. As always, great work, I'll keep watching programs of yours where I don't have a background with great confidence that you've got it right!
In 12 minutes you just explained what my professor, who has a doctorate in marine biology, has been trying to teach for six weeks. He has never made as much sense as this. Thank you!
Hank is my hero. He's strung together several semesters of work on my end into a nice review for the jump to another university. Cool recap for exams for anyone just starting: great connections for those of use who've been to caught in the minutea to remember the big picture. Seriously: all those notes from classes a lifetime ago came back to me. Hank I don't give a crud how you or your team infer the plural of Octopus. This series is nicely done!
I thoroughly enjoy all of your videos, in fact I use them to help me study for Biology. You should make some crash course videos for calculus. That would help me so much.
HANK IS AMAZING! i didnt really understand invertebrates in the ONE CLASS we had, and guess what, it carries the most marks in my 2nd term exam. thank you hank, from the bottom of my heart, in the most platonic way, i love you.
Honestly, I have a bio degree, and am doing an invertebrate biology class for a refresher....this was all the important parts from like 2-3 weeks, plus a better description on the the layers and what a coelom is and why it's important than I ever had, honestly....match this with a test and call it like 1/5th of a semester long course
Please triple-check on Platyhelminthes mouth/anus being on opposite ends of their bodies, mentioned at 5:15. Platyhelminthes only have 1 opening into their gut, according to both my professor and my textbook... If I misunderstood the context of what was said, please correct me. But I am studying for a test, and so this distinction is pretty important. Love these videos!
Hey, Hank. From a vlogbrother's video that I haven't been able to find this morning I seem to remember you stating it upset you (as it does me) when you say something incorrectly and no one (not even your friends) let you know about the mistake. 0:42, the phrase is take for granted, not granite. I do love your work and look forward to CrashCourse! Keep up the wonderful job you're doing!
Thank you for making these videos. I am learning so much. The rapid influx of information in my brain feels oddly similar to being energized by loud music, I would go so far as to call it euphoric.
Dear Hank, the view that Platyhelminthes is a basal group within the Bilateria is now outdated. Platyhelmintes are now considered within Lophotrochozoa, more derivate than Lophophorata for example... Cheers
Platyhelminthes actually have an incomplete digestive track meaning that there mouth and anus are the same opening which you got wrong at 5:00 when you said there were on opposite sides.
so I was at the Baltimore aquarium and a docent kindly informed me that the octopus has arms and not tentacles, the difference being that tentacles are purely for eating and arms can do things like open jars or escape hatches. Also did you know an octopus has taste sensors on its little suckers? I guess those are for tasting the escape hatch.
0:30 Eric's Song 7:18 Augustine 11:45 Whatever You Want 16:20 Lullaby for a Stormy Night 21:00 My Medea 28:15 Level Up 33:42 Kansas 38:37 Stray Italian Greyhound 43:00 The Last Snowfall 48:15 / 49:00 Flyweight Love (49 is where lyrics start) 53:00 Daughter 57:00 Jacob Corvidae enters the stage 57:56 Go On Make Promises (w/ Jacob Corvidae) 1:03:55 Landsailor 1:10:00 / 1:11:00 The Breaking Light 1:15:38 "How do you guys know my songs?" (w/ audience) 1:16:54 St. Stephen's Cross 1:22:45 Green Island Serenade 1:29:20 Soon Love Soon 1:33:30 Grandmother Song
O: You stepped on a dead Man-of-War?! *winces and shudders* I feel for you, Hank. I really do. I got a story similar to that - I got stung by a dead bee. :D It was cut in half too and my hideous luck made me land on my knee and jab it into my kneecap while bouncing on a cousin's trampoline in California. Wildfyreful: 0 Dead Bee: 1
This is something I would love to watch, because it is a class I didn't have room for in my schedule my senior year... It doesn't particularly fit into college courses for someone going into chemical engineering...
I'm taking a course of lectures at the moment which is basically the same as this but with a bit more latin in. Really glad I discovered Hank's channels recently :)
The divine beauty of language is, that no matter what of the three you call it, people still understand what you're talking about, so it doesn't matter.
I am also studying it right now. I'm getting both of those whys in my course. Things like the Charles Whitman case interest the hell out of me. Corpus callosum experiments are also really interesting. I am fortunate enough to have a great professor so I don't want to rush ahead and take any of the wind out of her sails. Thanks for the suggestion though.
I do realllly lice tge way this sir teaches. Like he just express everything in simple so its quite easy to understand and learn with fun. love these videos alot!
I subscribed for the history part of CrashCourse, and this was the first scientific one I have seen, but this was really interesting! I am definitely going to start watching these alongside the history.
How is an octopus a simple animal. It's an advanced animal that just lacks a notochord. It shows an early stage in terms of the development of core adaptations, sure, but it also has plenty of its own, making it quite advanced.
"simple" as biological term =/= "simple" as in everyday usage. That's actually the interesting thing, because Octopuses are the one group of remotely intelligent things that's the furthest from us of the evolutionary tree. Everything else obviously *kept* improving and diversifying on its own after our ancestors diverged from it. Modern bacteria are quite an efficient match at competing with us and our efforts to not be hosts for their parasytism, they just use simple and adaptable approaches against our sophisticated, but fragile ones.
I love your episodes and thanks for the invertebrate biology refresher! Your pronunciation sometimes drives me nuts but I am aware that we are from different parts of the world so I'll eventually get over it.
You guys should do a Crash Course segment on the Marine Sciences! Marine Biology, Oceanography, Careers in Marine Science, Ocean Conservation, Marine Chemistry, etc. That''d be beyond cool!
I might sound like an idiot but what do ppl think happened instead of evolution? Aliens or something??? (I mean.. How else would new life forms appear...)
Some people actually believe every single species alive today and that has ever existed just 'appeared'. Like they think the first humans appeared, maybe from a gust of wind that made a mini storm cloud full of particles of carbon, oxygen, nitrogen etc and arranged themselves into a human male, and then the exact same thing happened but a female was also formed. Then they had kids and their kids had a hell of a lot of incest with each other, and so did the grandkids etc etc...
Yeah, then the same thing happened for all the other animals, but at least two of the clouds crashed into each other accidentally and created the platypus. 😉
Oh pathology would be great. My friend and I were just talking about pathology today (he recently got to take part in an autopsy), and I didn't even think about these guys talking about it. Great idea.
Only just read the chapter about the Cambrian explosion in A Short History of Nearly Everything last night. I love it when my timing coincides so well (:
If I may try, Octopi have eight tentacles and round heads, and squids have ten tentacles (two are their main arms) and have somewhat pointed heads with "fins" either side, which help them manoeuvre. The most important distinction is that squids are somewhat rigid, in that they have a bone like structure that runs along their bodies, while octopi don't have this and will fit through whatever their beaks can go through; otherwise they practically take the form of whatever container their in.
A BIG RIP TO PEOPE WHO ARE WATCHING THIS FOR THE TEST TOMORROW. WISH ME GOOD LUCK CAUSE OUR TEACHER DOES NOT TEACH PROPERLY AND NOW WE HAVE TO APEAR FOR THE TEST TOMORROW
I found your channel yesterday and I've been bench watching it all night! You're doing a great job! Keep it up we are all benefiting and feel very grateful! Btw Loved the Rick and Morty reference!
"Making sense" has never been a driving force behind the English language. It may be something that people are debating, but the dictionary lists all three as acceptable plurals.
Is it just me or is the "unless your a sea sponge" quotes in the series have an eery resemblance to the Mongolotauge from crash course world history :)
Also, simple animals can be AMAZING. They can do stuff we could never dream of, like survive being cut in half as two separate organisms or survive ages in basically a coma or LIVE FOREVER... And octopuses are just awesome. I love them. They're cute and smart and cool. Also I remember how in Science of Discworld they talk about the cephalopods becoming intelligent and using tools (IIRC in the book they were the first ones to do so).
a lot of this stuff is going to be a large part of my veterinary biology and histology test next week. My lecturers are awesome, but this is fun :D But I agree with Matt, we need a sea sponge shirt!
Pretty much everything I need to know know the animal portion of my comparison biology of animal/plant class. My brain got so overloaded in the lecture, everything finally makes sense!
Having studied freshwater and marine biology and completed a minor in Zoology, this stuff is so fascinating to me. Surprised there was no mention of nudibranchs when talking about molluscs, nudibranchs are the prettiest of all the animals!
Fowler's Modern English Usage, of course! It's one of my favourite entries, saying something along the lines of "the only acceptable plural in English is 'octopuses', since 'octopi' is incorrect and 'octopodes' is pedantic" -- although sadly I think that's what he says in the second edition, and the edition I have at home is the first, which merely reads: "Pl. -uses; the Greek or Latin pl., rarely used, is -podes (-ĕz), not -pi;"
This debate happened a few hundred years ago in England. The same introverted classical scholars who are responsible for prescriptive beauties such as "don't end a sentence with a preposition" and "no split infinitives" decided that all three are correct, since "octopodes" is linguistically correct, and the other two were to common in use to eliminate. Honestly, I think that octopuses should be the only acceptable form because I personally like the word, but to each his own.
I really don't understand how anyone can dislike these videos...simplifies everything i learn in class
Was just about to write that
Also a great review for us who haven't been in school for quite a while! The basics are important.
Very useful information. I will take note
the teachers
Charlie Prott they probably take these videos for granite
Great great job! I have a biology degree and am doing some studying for an "invertebrate biology" class that's I'm taking as a refresher, this was perfect! Really, really well done. All the key points really fast, fully explained. I actually never had a proper explanation of the purpose/exact location of the coelom as I just received. As always, great work, I'll keep watching programs of yours where I don't have a background with great confidence that you've got it right!
Sponges are fantastic
-very simple
-can't relate
-not too special
-the Pluto of animals
In 12 minutes you just explained what my professor, who has a doctorate in marine biology, has been trying to teach for six weeks. He has never made as much sense as this. Thank you!
"They're like frickin' ocean ninjas! Cephalopods' got skills."
*eats takoyaki* needs more sauce
They don’t have skills, they **MADE** skills
Hank is my hero. He's strung together several semesters of work on my end into a nice review for the jump to another university. Cool recap for exams for anyone just starting: great connections for those of use who've been to caught in the minutea to remember the big picture. Seriously: all those notes from classes a lifetime ago came back to me. Hank I don't give a crud how you or your team infer the plural of Octopus. This series is nicely done!
I thoroughly enjoy all of your videos, in fact I use them to help me study for Biology. You should make some crash course videos for calculus. That would help me so much.
Thank you so much CrashCourse for these videos! They are such a huge help!
The closed captioning spelled out: "Cephalopods got skillz".
hahahaha
HANK IS AMAZING! i didnt really understand invertebrates in the ONE CLASS we had, and guess what, it carries the most marks in my 2nd term exam. thank you hank, from the bottom of my heart, in the most platonic way, i love you.
This is exactly what youtube needs for every subject in school ever. Thank you for making videos about my favorite subject!
bless crash course, I've been trying to do a zoology work sheet all night and could not find some answers except here. Thank you CrashCourse!!!!
Can I just get my bio credits from watch this series?
N-No? Okay...
if you watch it BEFORE you do the work you will be light years ahead of people who dont...esp if such people ALSO didnt pre-read the book.
You could watch this series and then clep out
Honestly, I have a bio degree, and am doing an invertebrate biology class for a refresher....this was all the important parts from like 2-3 weeks, plus a better description on the the layers and what a coelom is and why it's important than I ever had, honestly....match this with a test and call it like 1/5th of a semester long course
Can any channel be better than this??? I am in total love with this channel
I’m probably the only one watching this for entertainment
I love there to be a bit where you say "Except for...the sponges" before cutting to a picture of a motionless sponge as an anticlimax
Finally no more lame comments about AP tests.
Just give it a few months
still not seeing anything
or now
aastha sharma I remarked that this is the sort of thing that comes up in a 2nd year University course, maybe not AP.
PLEASE MAKE A VIDEO ON PROTOZOA!!!!! Thumbs ups please.
I was like ok lets crash course it, and then "really, hank? no protozoo video?" :( :(
well, they can't really make another crash course biology video now since their series is over
there's always a chance for series two
Peter Parker, not a very smart profile photo there Peter....
Please triple-check on Platyhelminthes mouth/anus being on opposite ends of their bodies, mentioned at 5:15. Platyhelminthes only have 1 opening into their gut, according to both my professor and my textbook... If I misunderstood the context of what was said, please correct me. But I am studying for a test, and so this distinction is pretty important. Love these videos!
This is correct. Platyhelminthes (e.g. Planaria) have one opening that serves as both mouth and anus.
Thank you Hank and crash course for making this series! You guys saved my grade
"They're like fricken' ocean ninjas." I don't think I'd ever have heard that sentence anywhere else...
Hey, Hank. From a vlogbrother's video that I haven't been able to find this morning I seem to remember you stating it upset you (as it does me) when you say something incorrectly and no one (not even your friends) let you know about the mistake. 0:42, the phrase is take for granted, not granite. I do love your work and look forward to CrashCourse! Keep up the wonderful job you're doing!
I watched these and passed my college bio 1 final
Learned more here than I did in the entire class
Thank you for making these videos. I am learning so much. The rapid influx of information in my brain feels oddly similar to being energized by loud music, I would go so far as to call it euphoric.
cramming for my bio exam with these videos. thanks!!
Ayyyy me too haha.
Dear Hank, the view that Platyhelminthes is a basal group within the Bilateria is now outdated. Platyhelmintes are now considered within Lophotrochozoa, more derivate than Lophophorata for example... Cheers
i know everything about biology, except what I don't.
He insults Paris Hilton and Real Housewives in the first ten seconds. That's one of the many reasons why I love Hank so much.
Platyhelminthes actually have an incomplete digestive track meaning that there mouth and anus are the same opening which you got wrong at 5:00 when you said there were on opposite sides.
so I was at the Baltimore aquarium and a docent kindly informed me that the octopus has arms and not tentacles, the difference being that tentacles are purely for eating and arms can do things like open jars or escape hatches. Also did you know an octopus has taste sensors on its little suckers? I guess those are for tasting the escape hatch.
3:45 scared the shit out of me
+John Cena OH MY GOD! IT'S THE REAL, TOTALLY NOT FAKE JOHN CENA!
Same here!
and the worms
lmao
thank you hank, thank you nerdfighteria! This will help a lot with the invertebrate zoology exam i have today!
0:30 Eric's Song
7:18 Augustine
11:45 Whatever You Want
16:20 Lullaby for a Stormy Night
21:00 My Medea
28:15 Level Up
33:42 Kansas
38:37 Stray Italian Greyhound
43:00 The Last Snowfall
48:15 / 49:00 Flyweight Love (49 is where lyrics start)
53:00 Daughter
57:00 Jacob Corvidae enters the stage
57:56 Go On Make Promises (w/ Jacob Corvidae)
1:03:55 Landsailor
1:10:00 / 1:11:00 The Breaking Light
1:15:38 "How do you guys know my songs?" (w/ audience)
1:16:54 St. Stephen's Cross
1:22:45 Green Island Serenade
1:29:20 Soon Love Soon
1:33:30 Grandmother Song
I wish good luck to Hank
O: You stepped on a dead Man-of-War?! *winces and shudders*
I feel for you, Hank. I really do.
I got a story similar to that - I got stung by a dead bee. :D It was cut in half too and my hideous luck made me land on my knee and jab it into my kneecap while bouncing on a cousin's trampoline in California.
Wildfyreful: 0
Dead Bee: 1
i feel you, bro (or female bro, whatever that is)
Please come teach at UConn, we need more teachers like this. WHY IS THIS NOT A THING PEOPLE?!
dang, hank is just going off at them housewives.
good man.
This is something I would love to watch, because it is a class I didn't have room for in my schedule my senior year... It doesn't particularly fit into college courses for someone going into chemical engineering...
Was anyone else amused by the piece of hair floating around in the video at about 10:13 - 10:17?
what??
i LIKE OREOS
omg (mind-blown)
I'm taking a course of lectures at the moment which is basically the same as this but with a bit more latin in. Really glad I discovered Hank's channels recently :)
You really shouldn't insult other people's intelligence Hank. I have seen you play Portal, and it wasn't pretty.
The divine beauty of language is, that no matter what of the three you call it, people still understand what you're talking about, so it doesn't matter.
I am also studying it right now. I'm getting both of those whys in my course. Things like the Charles Whitman case interest the hell out of me. Corpus callosum experiments are also really interesting. I am fortunate enough to have a great professor so I don't want to rush ahead and take any of the wind out of her sails. Thanks for the suggestion though.
This is good for starters but still not deep enough but, self study after watching this really helps.
I do realllly lice tge way this sir teaches. Like he just express everything in simple so its quite easy to understand and learn with fun. love these videos alot!
So much complexity simplified in these videos - thanks so mucho
If Apple was simple, then I could cut an iPhone in half and then I would have two working iPhones...
I subscribed for the history part of CrashCourse, and this was the first scientific one I have seen, but this was really interesting! I am definitely going to start watching these alongside the history.
How is an octopus a simple animal. It's an advanced animal that just lacks a notochord. It shows an early stage in terms of the development of core adaptations, sure, but it also has plenty of its own, making it quite advanced.
"simple" as biological term =/= "simple" as in everyday usage.
That's actually the interesting thing, because Octopuses are the one group of remotely intelligent things that's the furthest from us of the evolutionary tree.
Everything else obviously *kept* improving and diversifying on its own after our ancestors diverged from it. Modern bacteria are quite an efficient match at competing with us and our efforts to not be hosts for their parasytism, they just use simple and adaptable approaches against our sophisticated, but fragile ones.
Still, it's like a really, really fancy slug. It's pretty simple to have your throat go through your brain.
Kate Senatskaya It's the poor sea sponges who have it though. They're so simple they aren't even symetrical ~
the intro shady 😂 bless you Hank for these videos
3:45...well...now I'm awake.
SAME I totally got startled.
I am so glad someone wrote this! I want Ali to get credit when credit is due!!
Sooo.. the cambrian explosion was really just Earth's puberty
Thank you
I died within the first 3 seconds of this video when the simple dog from hyperbole and a half appeared. I love you guys
10:46 They're like freaking ocean ninjas. Cephalopod got skillz.
There is never gonna b a crash course without this is there?
Who was the person in the beginning? Was it Paris Hilton?
I love your episodes and thanks for the invertebrate biology refresher! Your pronunciation sometimes drives me nuts but I am aware that we are from different parts of the world so I'll eventually get over it.
10:14 There's a hair floating around.
You guys should do a Crash Course segment on the Marine Sciences! Marine Biology, Oceanography, Careers in Marine Science, Ocean Conservation, Marine Chemistry, etc. That''d be beyond cool!
were you joking about giving finishing touch on your time machine or you were serious
Are you joking or are you just stupid.
Thank you so much--you really know how to make learning fun!😄
WHAT DOES HE HAVE AGAINST SEA SPONGES i mean almost since the time he started talking about animals he's been dissing the sea sponges
Lol i guess because not everyone considers them "animals"
+tinytica13 i guess hes animalist
Crash course needs an exception on every show of theirs.
I might sound like an idiot but what do ppl think happened instead of evolution? Aliens or something??? (I mean.. How else would new life forms appear...)
Some people actually believe every single species alive today and that has ever existed just 'appeared'. Like they think the first humans appeared, maybe from a gust of wind that made a mini storm cloud full of particles of carbon, oxygen, nitrogen etc and arranged themselves into a human male, and then the exact same thing happened but a female was also formed. Then they had kids and their kids had a hell of a lot of incest with each other, and so did the grandkids etc etc...
Yeah, then the same thing happened for all the other animals, but at least two of the clouds crashed into each other accidentally and created the platypus.
😉
Precisely "aliens or something". Panspermia is a legitimate hypothesis.
God... Duh
+tinytica13
I rly hope ur ether 8yo or r kidding cuz that story is less believable than Santa Claus...
Oh pathology would be great. My friend and I were just talking about pathology today (he recently got to take part in an autopsy), and I didn't even think about these guys talking about it. Great idea.
IT"S Octopodes!!!!!!
_You're_ octopodes!
*octopi
These are getting better and better:D
Marry me?
I got you in my classroom! My teacher, the head of bio loves it he is telling the whole department to watch the channel :)
OhMY GOD THANK YOU CRASH COURSE. This zoology unit was killing me. Who knew that I only needed to watch one video to understand the meaning of life
just did my pre ap bio exam today; I credit Hank and Crash Course with 50% of my studying material :)
Always enjoyed watching CC.
Only just read the chapter about the Cambrian explosion in A Short History of Nearly Everything last night. I love it when my timing coincides so well (:
If I may try, Octopi have eight tentacles and round heads, and squids have ten tentacles (two are their main arms) and have somewhat pointed heads with "fins" either side, which help them manoeuvre. The most important distinction is that squids are somewhat rigid, in that they have a bone like structure that runs along their bodies, while octopi don't have this and will fit through whatever their beaks can go through; otherwise they practically take the form of whatever container their in.
I really really appreciate your videos, I always understand everything after wards
I love your videos! They're gems when it comes to review for exams.
A BIG RIP TO PEOPE WHO ARE WATCHING THIS FOR THE TEST TOMORROW. WISH ME GOOD LUCK CAUSE OUR TEACHER DOES NOT TEACH PROPERLY AND NOW WE HAVE TO APEAR FOR THE TEST TOMORROW
Thanks Hank for helping me have a great morning! Coffee+Learning=YAY! =D
I love the hyperboleandahalf reference with simple dog!
Love this guy!!! Also, great video.
I found your channel yesterday and I've been bench watching it all night!
You're doing a great job! Keep it up we are all benefiting and feel very grateful!
Btw Loved the Rick and Morty reference!
doe due the video date you didn't know you're making it :D
Good guy crash course biology, teaches you loads of info, then thanks YOU for watching it.
"they're like freaking ocean ninjas!"
I don't know whether to laugh or to cry 😂
"Making sense" has never been a driving force behind the English language.
It may be something that people are debating, but the dictionary lists all three as acceptable plurals.
Is it just me or is the "unless your a sea sponge" quotes in the series have an eery resemblance to the Mongolotauge from crash course world history :)
lmao i was thinking the same thing
Wait for it... the Mongols
please put subtitles in Portuguese, I love your videos 💕
Thank you thank you so much. I was struggling to memorize the information but you gave it so much meaning ❤️ love love love❤️
cant get enough of the crash course theme song- awesome
Also, simple animals can be AMAZING. They can do stuff we could never dream of, like survive being cut in half as two separate organisms or survive ages in basically a coma or LIVE FOREVER...
And octopuses are just awesome. I love them. They're cute and smart and cool. Also I remember how in Science of Discworld they talk about the cephalopods becoming intelligent and using tools (IIRC in the book they were the first ones to do so).
a lot of this stuff is going to be a large part of my veterinary biology and histology test next week. My lecturers are awesome, but this is fun :D
But I agree with Matt, we need a sea sponge shirt!
You changed it to Octopuses!!
Thank you crash course! Now youtube has a purpose to me!
High five on taking things for "granite". Another favorite of mine: "for all intensive purposes".
thank you for your time
Pretty much everything I need to know know the animal portion of my comparison biology of animal/plant class. My brain got so overloaded in the lecture, everything finally makes sense!
Having studied freshwater and marine biology and completed a minor in Zoology, this stuff is so fascinating to me. Surprised there was no mention of nudibranchs when talking about molluscs, nudibranchs are the prettiest of all the animals!
Fowler's Modern English Usage, of course!
It's one of my favourite entries, saying something along the lines of "the only acceptable plural in English is 'octopuses', since 'octopi' is incorrect and 'octopodes' is pedantic" -- although sadly I think that's what he says in the second edition, and the edition I have at home is the first, which merely reads:
"Pl. -uses; the Greek or Latin pl., rarely used, is -podes (-ĕz), not -pi;"
This debate happened a few hundred years ago in England. The same introverted classical scholars who are responsible for prescriptive beauties such as "don't end a sentence with a preposition" and "no split infinitives" decided that all three are correct, since "octopodes" is linguistically correct, and the other two were to common in use to eliminate.
Honestly, I think that octopuses should be the only acceptable form because I personally like the word, but to each his own.
Pretty cool video. 10:10 there's something floating around.