Complex Animals: Annelids & Arthropods - CrashCourse Biology #23

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects.

References:

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[skippinginthesky]

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

[elitetech]

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.

[Alima]

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

[rockinstrawberries]

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

[cheyennemarie]

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

[cnemi]

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.

[andiyuan]

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

[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…

[aijanmuktar]

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

[himanshuwilhelm]

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

[KatKinzer]

They mite.  Mite.
...Mite.

I think I'm in love with Hank.

[Dragontongue]

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

[kevinyou]

the rhinoceros beetle was so faking cute lmao

[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!

[sheller]

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

[elichamley]

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

[DataCabe]

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

[theunknownonetuo]

I'm here not because I have a test coming up... But because I'm writing a fiction story about arthropods!

[thunderbolt]

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

[manamejeffbeezos]

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