give the characteristics of flatworms algae roundworms.give their phylum too
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Flat worms
Phylum - Platyhelminthes
Dorsoventrally flat, i.e. flat body from top to bottom.
No true body cavity.
Mostly hemaphrodite, i.e., male and female sex organs present in the same individual.
Round worms
Phylum - Nematoda
Body is cylindrical.
Pseudocoelom (Sort of body cavity).
Sexes are separate.
Segmented worms
Phylum - Annelida
Body is segmented from head to tail.
True body cavity.
May be unisexual or bisexual.
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