How does the jelly fish live with no brain or no heart?

Jellyfish are genuinely fascinating creatures that manage to survive without many of the organs that we've come to think of as vital for life. read more

I believe jellyfish can survive without a heart because it is supported by homeostasis and metabolism. Some animals don't need a heart. Jelly fish dont have hearts because they dont need them they have no blood and no control over themselves They live by relying on nerve cells. read more

The thing is, while jellyfish don’t have a brain or central nervous system, they do have a very basic set of nerves at the base of their tentacles. These nerves detect touch, temperature, salinity etc. and the jellyfish reflexively respond to these stimuli. read more

I took quite a few biology classes. Invertebrates came up often. Jellyfish do not have anything you’d recognize as a circulatory system, so they don’t need a heart to pump and circulate anything. read more