Nevertheless, without the brain, heart, or blood, jellyfish have survived on Earth for over 650 million years. May 24, 2016
Which animal has no brain and heart?
A jellyfish is an animal without a brain or heart.
Which animal has no brain?
There is one organism that has no brain or nervous tissue. It's a sponge. A sponge is a simple animal that survives on the ocean floor by incorporating nutrients into its porous body.
Which animal does not have a heart?
Heartless animals include jellyfish, flatworms, and corals. Polyps, starfish, sea anemones, sponges, sea cucumbers, sea lilies. Jellyfish are the largest animals without a heart.
Which animal does not have a spinal heart or brain?
Jellyfish have no brain No heart, no lungs, no brain! So how do jellyfish live without these important organs? They do not need lungs because their skin is so thin that it can absorb oxygen through it.
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