Complex Animals: Annelids & Arthropods - CrashCourse Biology #23

[@elitetech7728]

Key terms mentioned in this video: Annelids Segmentation Arthropods Coelem Cephalothorax Crustacea Insect (Population compared to other organisms) Summary of this video: While humans and chordates may be pretty complex species, we could not have been so mighty without insects. On a side note, insects topple all other organisms combined. That being said, we must learn about these insects to get a better understanding of ourselves. Across the Disciplines: Angiosperms ("flowering plants") required the use of insects to evolve.

[@FraserSouris]

Nice

[@andiyuan1076]

"I love me catepillar" - Hank Green 2012 12:33

[@RobinDBank-yj4lw]

I love my caterpillar

[@sweatyeggboy8352]

"and tell me what you think we should name this one! thats all. bye" i nearly started crying

[@animationtime5813]

i want a catupiler

[@anxietti]

Andi Yuan For anyone interested, I think that’s a Hornworm he has in the video, it’s a squishy green larval form of a hawkmoth used as a feeder insect in the reptile trade

[@HomeInPaigeland]

I feel I need to personally thank you Hank for these videos. I know they are mostly for biology students and such, but I make my kids watch them. They are 7, 6, 4, and 2, and the LOVE them. A few days after watching this video my husband and I went out and left the kids with a sitter. Imagine her surprise when my 2 year old made a worm out of blocks, pointed to it and told her "Look it's segmented!" Your crash course videos are making my homeschooling even more effective! Thank you!

[@rockinstrawberries]

"and mites, they don't bother you at all..... they might..." I died

[@nikhiljose3775]

XD me too

[@nameless4630]

and his little smile when he said it xD

[@raven2269]

I shouted like: 'ayy!'

[@Kitkat915e]

It's at 6:51 if anyone was wondering

[@animationtime5813]

you died you meen did

[@cheyennemarie7075]

I think I can sum most of my fears up into one word: "arthropods."

[@rynsawyer4185]

+Cheyenne Marie Oh don't be such a spoiled sport! Arthropods are amazing and fascinating! And they probably help the environment more than you probably realize. So in a way they are helping us human being get by.

[@cosettemaclean3555]

+Lauryn Sawyer don't be mean, or a spoil sport

[@rynsawyer4185]

cosette mac lean I wasn't being mean. In fact I was trying to open her eyes. You can't hear the tone in which I'm speaking otherwise you would know that I'm trying to help her. Trust me, most people are mean to me for plenty of reasons so I try as hard as I can to be nice.

[@cosettemaclean3555]

girl, i am not trying to battle with you! simmer down!

[@xevious1538]

+Lauryn Sawyer Holy shit, she's joking.

[@skippinginthesky]

Watching this for review and I realized my professor basically stole this whole video word for word for his lecture...

[@MasterPoppers]

+skippinginthesky And they punish us for plagiarism.

[@Draganko123]

The fact that they plagiarize does not justify plagiarism.

[@MasterPoppers]

Draganko123 Yes, I know. They should be setting an example, though.

[@CylonNFinalFive]

And to think you payed what like 40K? to sit in a lecture hall listening to a regurgitation of free and open knowledge.

[@DesertScorpionKSA]

Busted.

[@Alima900]

Thankfully, Hank decided to not show us these graceful leeches up close by displaying them on his hand.

[@KatKinzer]

They mite. Mite. ...Mite. I think I'm in love with Hank.

[@greennitricoxide2706]

facepalm

[@elichamley]

6:41 Mites... witch don't bother you at all... well probably... they mite. *grins*

[@savvibuilds7264]

Eli Chamley which**

[@MysteriousAsteria]

I find it funny how in my culture people despise insects and say that people who eat them are dirty and gross. Yet everyone here likes to eat shrimps, crabs and lobsters…

[@MysteriousAsteria]

Everything should be okay, as long as the animal eaten is treated well before consumption and as long as if it's edible (obviously). An animal's cuteness or beauty should not be a reason not to consume it. Though I can see why eating a butterfly could be nonsensical. But in some regions people eat grasshoppers though. And where I live we eat lots of cute cows, goats, pigs and birds. I find it silly when people say they don't like it when beautiful animals are eaten, as if it were only okay when an animal is "ugly". Also I doubt a butterfly is beautiful for a reason. After all beauty is a human concept and not an inherent quality created by nature.

[@garrusn7702]

Insects and crustaceans are different though.

[@dylansimpson7831]

@@garrusn7702 how so?

[@garrusn7702]

AlphaPlantMom They’re from completely different phylogenetic groups. Both Arthropods. . .but still, not the same group of animals.

[@dylansimpson7831]

@@garrusn7702 yes I know that, I was just wondering why you, or if you differentiate between them as food and not food

[@cnemi2112]

I used to think spiders were creepy, too...UNTIL I REALIZED HOW AMAZING IT IS TO WEAVE A TRAP FOR YOUR PREY OUT OF YOUR BUTT! Seriously, I mean what kind of crazy evolution is this?! Butt nets! Well played, spiders. And they rebuild them really quickly. Busy little critters.

[@adlers6756]

pff anything can shoot guts out of its anus if it tries hard enough (granted it has guts)

[@ilikeoranges4]

@patrick Chen anyone can do that by going to Taco Bell.

[@benharris8382]

Adler's upload area Unkile a sponge XD

[@moth9442]

pretty spot on, but, in partial metamorphosis often a key difference between adults and nymphs is that the nymphs always lacks wings, while the adults may have them (although in some cases the wings are not suited for flight.) Examples include mantids, stick and leaf insects, and cicadas, to name a few. So, the difference between partially metamorphosing nymphs and adults is not just limited to size.

[@Dragontongue18]

Jeff. It should totally be Jeff. In the future, you name everyone Jeff. Also that rhinoceros beetle was totally adorable! (And so was the pupa until it moved...I didn't expect it to move. But then it was cool again!) Good episode. xD

[@benharris8382]

SamuraiMatt He should name ot Eggbert to be ironic.

[@Pauline-vc9jj]

the creatures in his hands are so beautiful!!!

[@himanshuwilhelm5534]

The earthworm is trying to scream "help me, i've' been abducted by an insane giant monstrosity!"

[@minnadoesntknow]

These videos are seriously teaching me/helping me study for finals way more than my professor has all semester. And what's even better? Hank Green doing it. THANK YOU.

[@Jacquelyntb]

Watching this for my finals 👍🏽

[@VividImpulse]

Same 😂

[@professorAP]

Sir that was the most amazing explanation the world could ever have. Thanks

[@bzimm18]

My favorite line in this one is: "So insects, basically wizards, but not as delicious as crustacea, the insects of the sea." Only someone as awesome as Hank could make a segway like that! Or should I say a SEGMENT like that!

[@kevinyou6539]

the rhinoceros beetle was so faking cute lmao

[@kevinyou6539]

and dude, I want that caterpillar at the end lmfao

[@NoActuallyGo-KCUF-Yourself]

They looked so cuddly.

[@estrellaluna6579]

12:33 This absolutely made my day! Oh Hank... I love you so much. xD

[@manamejeffbeezos]

This is a hard video to watch when you have multiple creepy crawly phobias. But it's worth it. I MUST LEARN!

[@jadereagan187]

Thank you so much for these videos! It is such a fun, new way to study and review material.

[@nicole.sahebi]

That was so helpful!!! Who could have explained that better? I got a 100% on my test because of this video!!! Keep making these videos they actually help. And who eats food while watching a video on insects... There is a title for a reason :D

[@Breadbeecp]

Crash course physics!!

[@Argacyan]

One day, there shall be physics ! But not yet

[@zemorph42]

gnhtd1 Awww! But I want it *now!*

[@violet_broregarde]

btw it's been going for almost a year and it's awesome

[@CB-sk1pq]

Nominated for grossest crash course video...thumbs up if you agree.

[@nero91]

OH GOD THE WIGGLE ON THE PUPA

[@aijanmuktar6281]

I knew I didn't play Animal Crossing for nothing.

[@afuentes3650]

I love this series you guys rock! Teach way better than my bio professor.

[@skydentang1067]

A Fuentes I agree

[@Roboto2073]

I love this show. It's great that my 6yr old loves this show. Thank you CrashCourse.

[@mellowfish316]

fun fact: the woodlouse (aka pill bug, aka roly-poly) looks like an insect but is in fact a land dwelling crustacean. It actually has gills! source: en.wikipedia.org/wiki/Woodlouse

[@Gajoobles]

Technically insects are thought to be part of the crustaceans (according to molecular analysis) although it is still debated.

[@TheViolentFlame]

This was my favourite Biolography so far.

[@thunderbolt5982]

"this is the rhinoceros beetle pupae..........which is exceptionally creepy" *laughs kinda creepily but also enjoying the creepy bug*

[@TheSkinnychef1620]

A bit off topic, but I just noticed how good the advertisements generally are before the Green brother's videos. Some of them are so informative I occasionally get caught up and find myself forgetting I'm supposed to be watching crash course...

[@sheller153]

Your little hornworm friend should be named Horace, Horace the Hornworm... Though by now he'd probably be a sphinx moth...

[@nekodahemmings5696]

great job at distributing so much information in such short time- very helpful

[@quantusmechanicus5921]

12:55 Name him Phil

[@m4rcus4ur31ius]

I've been waiting for this one. Excitedly waiting.

[@sarahstarr5375]

6:52 did he just... The puns are so strong

[@DrReginaldFinleySr]

Sarah Starr Yes, the puns are strong with this one.

[@deuzvoltz2804]

All Mite>PLUS ULTRAAAA!

[@crazytricksmore7121]

The pun was al mite y

[@ammarismailbaig3304]

@@deuzvoltz2804 PLUS ULTRAAAAA! my hero academia??!!!

[@samanthapedroso2726]

Sarah Starr aa

[@roso614]

this is awesome. im 21 now and im still a nerd for this

[@brittneyr2490]

Thanks for not doing a close up on the arachnids :)

[@Blackdrose]

Hank is so precious when he's describing the larvae and pupa of the rhinoceros beetle lol... also, the " I LOVE MY CATERPILLAR" line is so cute

[@matthewelling7479]

6:55 whatever greeks

[@MrDontcaretube]

I just really enjoy listening to his voice.

[@gomishow4334]

I am terrified.

[@Beazore123]

I'm depressed that you guys made these later than May (AP Biology Exams), yet very happy that they exist all the same. :)

[@DataCab1e]

Automotive crash course! Oh, wait, that doesn't sound right.

[@astudyinmarkgatiss]

These videos are helping me pass my biology course. Thank you.

[@sarahwarren9762]

Love your series on animals! - but what about Echinoderms?

[@Alisora]

Something i will enjoy watching during the summer

[@Upper_echelon_exotics]

Hank is pretty cute at the end of this video.

[@TheDarkmagic94]

To be fair - he's always cute. hashtagSorryNotSorry

[@Dragontongue18]

Rick Jackson It's true. Him AND The Katherine.

[@purplestarfish90]

I wish we had covered this in my IB Bio class. I remember reading my study book for it and looking at all the extra HL topics that were so much more interesting than the ones my teacher chose, and I think this was one of them. Thanks Hank!

[@ChaseHoman]

I knew some of those words.

[@Demifurrr]

Chase Homan haha i think thats a good sign

[@carisjeffrey5965]

+Demifurrr dc xxv. cc a si CAZS

[@omarabdelkadereldarir7458]

Hank... I love you.

[@yeagercomics]

WHY DID I WATCH THIS BEFORE BED?! I WAS NOT PREPARED FOR THAT PUPA TO MOVE

[@trenthaugen2474]

hank you are my favorite you tuber, i watch your videos just for fun

[@Neha71580]

In honour of making my bio lab test so much easier, name the caterpillar....*drumroll* LUCY! (cuz why not)

[@dixiegifford6685]

i just want to say thank you so much for making these videos! they help me so much! you make biology interesting! my boyfriend thought it was very interesting especially when I tossed my computer halfway across the room when the beetle flashed across the screen! that thing is HUGE! ever since the mummy I am terrified of beetles!! but I managed to pull myself together and enjoyed watching your video.. thanks again!

[@ZoggFromBetelgeuse]

You could call it "Shai-Hulud".

[@beckycooke8954]

These videos are amazing, they have really helped me with my university revision. THANK YOU :)

[@brandonhalls9394]

Annelida is actually latin for little rings, not greek. @2:34

[@NorthernSpartan]

True, i am greek and that's not greek

[@darcymarriner670]

I read that as "True, I am greek and that ain't geek" like you where some rapper

[@ScarlettRedTea]

Annelida ist both, annus -> latin, eidos -> greek. When speaking of greek in science, they usually refer to Ancient Greek.

[@theresepabroa4389]

I had to watch this video in 0.5x speed and I just kept laughing all throughout the video because Hank sounded really bored and tired. But then he makes his little quirky jokes and it is 10 times as funny because you can really see the awkward expressions on his face. haha! I love it :D

[@moxsedai]

Oh look, it's Heracross!

[@ryanding7384]

Pokemon Nerd

[@walkingbushie3568]

Hey there's a Caterpie!

[@Archfay]

Thank you so much for saying centipedes and millipedes before you actually showed any! You've saved me weeks of nightmares because I was able to look away in time.

[@SteveSimi]

It always bugged me how words such as "Arthropods" and "Arthropoda" are used. They both come from the plural of "Arthropod" and we tend to use them in different situations..... That applies with Annelids and Annelida, Chordata and Chordates, Nematoda and Nematodes and basically most phyla.

[@kw_cooper]

...It always... 'bugged' you...

[@rongpirson5250]

Molluscs and Mollusca

[@rthecrook]

I wish I had this during my first year of undergrad, it would have made my life so much easier!

[@ssladler]

lol @ "they might".

[@jacobhdz127]

I literally replayed that part so many times

[@yeseniaalvarez4882]

this video is my favorite. Laughed a lot while still learning, loved it!

[@vaendryl]

I highly regret turning on this video while eating dinner

[@VictorFursov]

Thank you for presentation. Good luck!

[@TheDarkmagic94]

I was totally fine with the intro until I realized those bugs were REAL!!! Almost contracted severe muscle spasms from violent involuntary squirming. Aaaarrrggghh!!! Don't even get me started on those close up shots...!!! Thank goodness for Hank, though. At least I can learn about them through my computer screen, far removed from those... those... Aaaarrrrgghhhh!!!!

[@dean6172]

yyyaaa! i hate bugs 2!

[@EricRovelo]

I thought they were plastic at first then he pulled out the worm and I was like whaaa????

[@Appo47]

what a fucking girl

[@Kino-Imsureq]

they arent arghthropods

[@pg9ilta17c]

hank is just too perfect

[@aryannaherasme5569]

Warning: Strongly Religious People Beware: Evolution is a huge Subject in This Long Playlist of Biology

[@killerbee2562]

Thankfully we haven't had to many of them on this video.

[@Argacyan]

killerbee256 God shall be praised, for there aren't many of them... Wait a minute XD

[@omarsharief8101]

I skipped all of them

[@theninjaswede]

Hank! Look! I'm watching crashcourse videos for homework! My bio teacher is awesome.

[@makemyday5521]

DON`T YOU FIND IT GROSS HOLDING ALL OF THOSE BUG IN YOUR HANDS I WOULD HAVE TROULBE BEING 5FT AWAY!!!!!!!

[@dean6172]

Kate Senatskaya i like snakes! weird ryt? lol!

[@HandWarmingRobot13]

My favourite part was when Hank said "I love my caterpillar." It was adoreable. It's a pretty cute caterpillar to be fair.

[@aussiebaka4588]

I have first cousins that are less complex, interesting, and attractive than your beetles and earthworms there.

[@krisa5170]

you make zoology 101 not boring mate I thank you

[@kirigirikyouko4875]

eeeeeeeeeeeeeeeeeeeeeeeeeew Hank just touched a worm OMG! >.

[@sherylhosler9487]

ARTHROPODS ARE SERIOUSLY THE COOLEST!!!

[@revolutionaryhd-zt5yb]

thank you, I passed my 7th grade bio test

[@thedaytontriangle3448]

I wish good luck to Hank

[@MrBurningDonkies]

more ppl need to watch these!

[@FerretsForever94]

You are like, the best parent ever!

[@johanhsands543]

i love crash cousre hank makes science easy and funny

[@fevure]

Thank you, I have an A in my zoology class because of your videos! :*

[@JamBear]

This is so good it almost made me care about biology! Off to do real science in my physics lab! Nyuk nyuk nyuk

[@fullthrottle254]

makes biology class sooooo much easier... thanks guys!!! and name him Harold Hemsworth II

[@Ilamarea]

Hanks face when he commited the Mite pun was priceless xP

[@awfulwalful9754]

I had to take it off 1080p just to watch this!! I keep on stairing at that Huge Zit!!

[@depressio117]

You guys should do a Crash Course: Entomology. Hard to do justice to the most speciose organisms on the planet in just half an episode.

[@chayishurr]

Love you hank!

[@msferruzza]

I have to say it: Anellida comes from Latin 'anellus'. In greek it would be 'daktylios', but it means also 'little finger' (and also something worse!). Hate to be pedantic, but latin and greek is my job :) However, I LOVE this travel into the animal kingdom. My mother is a biologist and explained me taxonomy when I was a child

[@balqend]

I always thought that if I ever meet Hank, I would shake his hand or something, now I'm not so sure about that *shivers*

[@NucleusDawn]

You, my friend, did not forget to be awesome today.

[@cdplayerjunkie]

By far my favourite video:) But they are all great.

[@robinchesterfield42]

I remember when I was a kid in Iowa, I used to go around putting earthworms in our backyard garden once I knew they were good for the soil. I'd also sometimes try to put sidewalks worms into the shade before they died. So that didn't creep me out at all! Also used to catch fuzzy caterpillars. Poisonous and blood-drinking bugs, though? Yeahno.

[@quinofking]

for the last episode of Crash course World History and Biology Hank and John should host the others show!

[@NotaWalrus1]

As a sufferer of Vermiphobia (fear of worms) watching this whole video is a painful yet rewarding experience

[@Makosis]

Yes, it's time for SCIENCE!!