lil guy has asked me a couple of animal questions that I had to look up. Here's one.

No, bats don't get headaches from hanging upside down. They have valves in their circulatory system that prevent blood from pooling in their heads, just like we do to keep blood pooling in our feet. But reversed. Also their bodies are small.

Why do octopus need 3 hearts?

Two run blood over the animals' gills so they can breathe. the third keeps circulation going for their other organs. this third heart stops beating when octopus go swimming, which explains why they prefer to crawl using their legs. Swimming exhausts them rather quickly.

I'm not sure what he was watching, but it sounds like maybe it was an explainer about the circulatory system in different animals

One I just know is elephants have large ears bc they're an efficient way to cool the blood. That's why African elephants have larger ears than Indian elephants. The ambient heat is hotter in Africa.

A fun one:

To get blood to travel up their necks, giraffes have twice the normal blood pressure of a human (280 over 180). Giraffes actually have small hearts, but they have powerful beats with thick muscles in the left ventricle.

The longer a giraffe's neck, the thicker the muscles in its heart. Powerful beats!!

@InternetEh @hoppet what's really impressive is the series of valves that let us bend down without passing out

@InternetEh @SapphicGiraffic same lol. i don't pass out when i bend down but sometimes my vision blacks out a bit and i get real disoriented/dizzy lol. i'll take low blood pressure over high blood pressure anyway though :P

ALSO SORRY for all the delete-redrafts i need to learn how to post good lol

@InternetEh How hot would the ambient heat have to be to create a Dumbo-style flying elephant

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