Centaur

"How do there ribcage work? Do they have 2 or is it like a long snake one?"

"Maybe it'd be like a ball and joint where the horse and human connects."

"How do the organs work?"

"I think like lungs and heart is in the human part and stomach is in the horse."

"They are like bugs in some ways, so do they have a larve stage?"

"Maybe"

"Can they stand up on they're back legs?"

"Like a cat?"

"Yeah."

"They're back legs would break."

"When they run do they put they're human part down like parallel to the ground, or is it up right?"

"So they'd be staring at the ground?"

"Maybe, maybe the head would be connected wierd like a dog."

"Hmmm.... thatd be creepy."

There is more, I just got lost and it made no sense so I went and read fanfics instead.

They're not immortal like most monsters. When Chiron's stripped of his immortality in Sea of Monsters, he's said to already look older. That being said, when they die would they get sent to Tartarus like most monsters, or would they be reincarnated as, say, a flower or tree like satyrs?

Y'all remember Geryon? The one who couldn't die easily because he had three hearts? So I'm wondering... Centaurs have two body, man and horse, right? So Centaurs have two hearts, one of human body and one of horse body right? So wouldn't Centaurs be really hard to kill?