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A jellyfish is made up of mostly of water. 95% of water to be exact.

They survive without blood, a spine, a heart or a brain. Instead they have a nerve 'net' which they use to detect danger, find food, etc.

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. They use that information to help them move about their surroundings and they sense food or predators. Other sensing organs help them figure out if they are moving up or down, towards light or away from it.

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9y ago
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16y ago

Jellyfish nervous system is made up of two neural rings, an inner and an outer one, located in the margin of the umbrella.

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Q: How does a jellyfish survive when it does not have a brain or heart?
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What are the brainless animals?

A jellyfish & a starfish A Jellyfish has no brain & no heart A starfish has no brain & no blood


What living animal has no heart but has a brain?

jellyfish


Can a person survive without heart but with brain?

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Is it true a jellyfish has no brain or heart like a Republican?

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Is a jellyfish an inverterbrate?

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Which one is most important heart or brain?

Heart is more important than your brain. When you fall in love you give your heart and not the brain. There are more songs on heart than brain. When it comes to learning also, your teacher and parents advice you to learn by heart. Joke apart, both the organs are vital for you and such comparison can not be done. You can not survive with non functioning heart. You can survive with non functioning brain. There is no meaning to existence with non functioning brain.


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