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What animals do not have hearts?

Oliver Kim | 2023-06-11 12:23:20 | page views：1886
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Zoe Wilson

Studied at the University of Tokyo, Lives in Tokyo, Japan.
Most of the major groups of animals (phyla) do not have hearts. Sponges have no hearts. They have no organs at all. Cnidarians and ctenophores (jellyfish), and platyhelminths (flatworms), have no hearts and generally use their gastrovascular cavities (guts) for circulating nutrients around the body.
2023-06-12 12:23:20
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Isabella Gonzales

QuesHub.com delivers expert answers and knowledge to you.
Most of the major groups of animals (phyla) do not have hearts. Sponges have no hearts. They have no organs at all. Cnidarians and ctenophores (jellyfish), and platyhelminths (flatworms), have no hearts and generally use their gastrovascular cavities (guts) for circulating nutrients around the body.
Do all animals have hearts, even the microscopic ones? - Quora
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