ANIMAL KINGDOM Part-10, NCERT Class-11
Phylum – Platyhelminthes • Dorso - ventrally flattened body structure(thats why it is called Flatworms ) • Mostly Endoparasitic • Bilaterally symmetrical , Triploblastic , Acoelomate • Flatworms show Body - Level of Organisation . • In Parasitic form, Hooks and Suckers are present • Flame Cells help in Osmoregulation and Excretion . • Hermaphrodite • Flatworm named Planeria show high regenaration capacity. • Internal fertilization. • Development through many larval stages. Example: • Taenia (Tapeworm) • Fasciola (Liver fluke)