What is mean by Phylum Platyhelminthes?

1.	What is mean by Phylum Platyhelminthes?
Answer» The phylum name Platyhelminthes literally means "flatworms." Have dorsoventrally flattened body. Are endoparasites in animals. • Are bilaterally symmetrical, triploblastic, acoelomate. • Absorb nutrients through body surface. • Parasite forms have hooks and suckers. • ‘Flame cells’ help in osmoregulation and excretion. • Fertilisation internal. Many larval stages. Planaria has high regeneration capacity. e.g., Taenia, Fasciola.

Answer»

The phylum name Platyhelminthes literally means "flatworms."

Have dorsoventrally flattened body. Are endoparasites in animals.

• Are bilaterally symmetrical, triploblastic, acoelomate.

• Absorb nutrients through body surface.

• Parasite forms have hooks and suckers.

• ‘Flame cells’ help in osmoregulation and excretion.

• Fertilisation internal. Many larval stages. Planaria has high regeneration capacity. e.g., Taenia, Fasciola.

Discussion