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What animals do not have hearts?
Questioner：Zoe Davis 2023-06-11 12:23:20
The most authoritative answer in 2024
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Benjamin Martin——Works at the International Monetary Fund, Lives in Washington, D.C., USA.
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.read more >>+119962023-06-17 12:23:20
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