Organism Without Heart
Is there any organism without heart?
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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.
Cnidarians and ctenophores (jellyfish), and platyhelminths (flatworms), have no hearts and generally use their gastrovascular cavities (guts) for circulating nutrients around the body.
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Sponges is the one ....
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