Simple Animals: Sponges, Jellies, & Octopuses - Crash Course Biology #22

[@charlieprott4334]

I really don't understand how anyone can dislike these videos...simplifies everything i learn in class

[@jessicapinto3817]

Was just about to write that

[@nikkia3d]

Also a great review for us who haven't been in school for quite a while! The basics are important.

[@Derpsii]

Very useful information. I will take note

[@harrywang6792]

the teachers

[@amberbaker9504]

Charlie Prott they probably take these videos for granite

[@jlong691]

Sponges are fantastic -very simple -can't relate -not too special -the Pluto of animals

[@serrerwe]

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!

[@meganriehle13]

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!

[@torbenhamilton4267]

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.

[@rynsawyer4185]

"They're like frickin' ocean ninjas! Cephalopods' got skills."

[@demonking86420]

*eats takoyaki* needs more sauce

[@Zer0_Flowers]

They don’t have skills, they **MADE** skills

[@renadam12]

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!

[@frog8313]

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.

[@VincePolevault]

This is exactly what youtube needs for every subject in school ever. Thank you for making videos about my favorite subject!

[@daniellegarcia9]

PLEASE MAKE A VIDEO ON PROTOZOA!!!!! Thumbs ups please. I was like ok lets crash course it, and then "really, hank? no protozoo video?" :( :(

[@aasthasharma3820]

well, they can't really make another crash course biology video now since their series is over

[@tensequel7818]

there's always a chance for series two

[@poisonousdurian3689]

Peter Parker, not a very smart profile photo there Peter....

[@s12610]

Thank you so much CrashCourse for these videos! They are such a huge help!

[@Dmartinez941]

Please come teach at UConn, we need more teachers like this. WHY IS THIS NOT A THING PEOPLE?!

[@kaseycoverdale5837]

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!!!!

[@Yamikaiba123]

Finally no more lame comments about AP tests.

[@suicidallysosome4651]

Just give it a few months

[@aasthasharma3820]

still not seeing anything

[@aasthasharma3820]

or now

[@Yamikaiba123]

aastha sharma I remarked that this is the sort of thing that comes up in a 2nd year University course, maybe not AP.

[@erinkeiko8951]

Can I just get my bio credits from watch this series? N-No? Okay...

[@alal1322]

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.

[@frankenstein6144]

You could watch this series and then clep out

[@serrerwe]

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

[@amritasriv87]

Can any channel be better than this??? I am in total love with this channel

[@ebyqadir1]

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!

[@ericcartmansmom]

This is correct. Platyhelminthes (e.g. Planaria) have one opening that serves as both mouth and anus.

[@WildFyreful]

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

[@thepengu1no227]

i feel you, bro (or female bro, whatever that is)

[@dakotahun]

cramming for my bio exam with these videos. thanks!!

[@PastPerspectives11]

Ayyyy me too haha.

[@JanhaviMishra]

Thank you Hank and crash course for making this series! You guys saved my grade

[@jameswallace9906]

I watched these and passed my college bio 1 final Learned more here than I did in the entire class

[@elle.9839]

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

[@houstoncambodia]

The closed captioning spelled out: "Cephalopods got skillz".

[@aasthasharma3820]

hahahaha

[@ScrapperTBP]

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

[@mint_e7536]

I’m probably the only one watching this for entertainment

[@bridget51992]

thank you hank, thank you nerdfighteria! This will help a lot with the invertebrate zoology exam i have today!

[@jerietr]

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.

[@maxkuzmin609]

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.

[@MixesnTunes]

3:45 scared the shit out of me

[@dylanfox8870]

+John Cena OH MY GOD! IT'S THE REAL, TOTALLY NOT FAKE JOHN CENA!

[@javi2542]

Same here!

[@saherkhan9845]

and the worms

[@kieranpinto158]

lmao

[@simonebrandao2861]

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

[@LucasHutchinsonIsGreat]

There is never gonna b a crash course without this is there?

[@GarrigKitten]

"They're like fricken' ocean ninjas." I don't think I'd ever have heard that sentence anywhere else...

[@jeonmochi9974]

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!

[@hmm7808]

This is good for starters but still not deep enough but, self study after watching this really helps.

[@TheDoomAmbassador]

Crash course needs an exception on every show of theirs.

[@ren514]

dang, hank is just going off at them housewives. good man.

[@iVindicate]

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...

[@perbhatkumar3842]

i know everything about biology, except what I don't.

[@lesliesmith2246]

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!

[@Micklemoose]

You really shouldn't insult other people's intelligence Hank. I have seen you play Portal, and it wasn't pretty.

[@mirabellehayati5582]

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

[@superdude4380]

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.

[@KendrixTermina]

"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.

[@joshuahadams]

Still, it's like a really, really fancy slug. It's pretty simple to have your throat go through your brain.

[@kendrixhavlik3051]

Kate Senatskaya It's the poor sea sponges who have it though. They're so simple they aren't even symetrical ~

[@thedaytontriangle3448]

I wish good luck to Hank

[@michellegiacontiere1639]

Was anyone else amused by the piece of hair floating around in the video at about 10:13 - 10:17?

[@unikittycakee7917]

what??

[@alexanderblake5780]

i LIKE OREOS

[@fionac7736]

omg (mind-blown)

[@ChandlerPritchett]

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.

[@gracekern3295]

Sooo.. the cambrian explosion was really just Earth's puberty

[@ijustwannacommentnotmyreal9814]

Thank you

[@reettata]

So much complexity simplified in these videos - thanks so mucho

[@TheOtivid]

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.

[@foofallsmilez]

10:46 They're like freaking ocean ninjas. Cephalopod got skillz.

[@GringatTheRepugnant]

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 :)

[@sukritganesh6101]

Who was the person in the beginning? Was it Paris Hilton?

[@anothergreatetcetera]

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 (:

[@FROPDESAI]

10:14 There's a hair floating around.

[@friends123sitcom]

just did my pre ap bio exam today; I credit Hank and Crash Course with 50% of my studying material :)

[@bluelandyaandgreenlandya1788]

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

[@tinytica1398]

Lol i guess because not everyone considers them "animals"

[@mariebelfond29]

+tinytica13 i guess hes animalist

[@HushJoe]

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!

[@samiimas3726]

were you joking about giving finishing touch on your time machine or you were serious

[@Frt778]

Are you joking or are you just stupid.

[@fluffycommander]

Good guy crash course biology, teaches you loads of info, then thanks YOU for watching it.

[@MagnusSkiptonLLC]

3:45...well...now I'm awake.

[@emmyissa1054]

SAME I totally got startled.

[@WoWDart]

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.

[@izzysmith6352]

IT"S Octopodes!!!!!!

[@Inediblehulk]

_You're_ octopodes!

[@rongpirson5250]

*octopi

[@RoedeIda]

These are getting better and better:D

[@perbhatkumar3842]

If Apple was simple, then I could cut an iPhone in half and then I would have two working iPhones...

[@o0Theresa0o]

I am so glad someone wrote this! I want Ali to get credit when credit is due!!

[@s.a.1615]

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...)

[@jamesmallon1631]

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...

[@thepip3599]

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. 😉

[@Appo47]

Precisely "aliens or something". Panspermia is a legitimate hypothesis.

[@tinytica1398]

God... Duh

[@s.a.1615]

+tinytica13 I rly hope ur ether 8yo or r kidding cuz that story is less believable than Santa Claus...

[@podoc16]

cant get enough of the crash course theme song- awesome

[@ashlimartin1611]

Marry me?

[@josephmoore4764]

Great video. A lot of new information is coming out with DNA sequencing though. Evolutionarily coeloms seem to have developed multiple times. Flatworms, molluscs and segmented worms are all more closely related than previously thought. Roundworms and arthropods are also closely related. There are 5 identified groups in Kingdom animalia, Sponges, Comb Jellies, Cnideria, Placozoa, and Bilateral, and almost no one can agree on how they're all related.

[@nellad6310]

the intro shady 😂 bless you Hank for these videos

[@Bristlefurr]

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.

[@sarahhello27]

The book has blank pages......you are amazing 😘

[@BFisichella]

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.

[@nycs9738]

love you guys. i literally wanna go to work to make money only so i can donate it to you guys

[@MrSpooooo]

I got you in my classroom! My teacher, the head of bio loves it he is telling the whole department to watch the channel :)

[@WoWDart]

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.

[@rachelshaskin2584]

At first I felt somewhat apprehensive to relearning Bio 11 from a plaid-claid hipster, but I watched your video and found it educational and enjoyable!

[@rachelolson6755]

I love the hyperboleandahalf reference with simple dog!

[@patriciamcgeorge2575]

Crash Course -Palaeontology -Mathematics (Seriously, HOW has this one not been done?) -Future/Technology -Culture/Religeon -Linguistics -Heritage/Provenance -Music/Drama/Circus/Film/Magic (Performing Arts) -Art/Textiles/Woodwork/Typography/Graphic Design/Photography/Landscaping/Interior Design (Visual Arts/Technologies) -Cooking -Sports/Extreme Sports/Athletics/Acrobatics/Gymnastics etc -Millitary Science -Reading/Writing -Popular Culture -Practical Skills

[@BurntEggsIsGood]

Always enjoyed watching CC.

[@choowygamerz]

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 :)

[@ellieschemmel6948]

lmao i was thinking the same thing

[@xavierstanton8146]

Wait for it... the Mongols

[@smwillia]

They are geniuses and we reap the benefits of their making learning fun, much as it should.

[@isa.rodrigues]

please put subtitles in Portuguese, I love your videos 💕

[@HKragh]

Well, The format of crash course would be great in any body of knowledge. So, I'm all for Crash Course Math. And Physics. And Especially; Astronomy!

[@raph009]

I love your videos! They're gems when it comes to review for exams.

[@000LiveLoveLaugh000]

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!

[@The90SecondMom]

High five on taking things for "granite". Another favorite of mine: "for all intensive purposes".

[@TheNerdKnownAsDavid]

I really wish these were shown in schools. I would totally show my class these videos if I were a teacher.

[@dilleraimer]

I died within the first 3 seconds of this video when the simple dog from hyperbole and a half appeared. I love you guys

[@SweetBabyMonkeys]

Thanks Hank for helping me have a great morning! Coffee+Learning=YAY! =D

[@470d4w4]

Pretty cool video. 10:10 there's something floating around.

[@kibcubed]

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.

[@acacialocke645]

Watch your videos in Biology class all the time.

[@targaryan5697]

I was watching this on high volume with headphones when the explosion occurred. Thanks Green.

[@empress1183]

I really really appreciate your videos, I always understand everything after wards

[@jenniferhansen8374]

Thank you crash course! Now youtube has a purpose to me!

[@MegaMetroidZeldaMan]

The floating piece of string at 10:10 has become one with Hank.

[@Draidis]

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.

[@elfkwest]

that is the correct expression. people who don't understand the expression often say what they hear, which is "granite." which is incorrect, because it makes no sense.

[@syystomu]

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).

[@teatimetutoring6262]

Learning from BANGLADESH 🇧🇩🇧🇩🇧🇩🤩