Animal Kingdom

Animals of phylum–Platyhelminthes have hooks and suckers and are endoparasite of other animals.

These are triploblastic, bilaterally symmetrical, acoelomate animals with blind sac body plan. They live as endoparasites in intestine of other animals. For this purpose, they bear hooks or suckers near their mouth region which help them to cling on the intestinal walls of the host and obtain nutrition.

Aschelminthes (roundworm) show organ level of symmetry and are triploblastic and pseudocoelomate.

Annelids are bilaterally symmetrical, triploblastic and coelomate animals.

Arthropods These are bilaterally symmetrical, triploblastic segmented, coelomate animals.

Taenia solium belongs to the class – Cestoda and Dugesia (Planaria) belongs to Turbellaria class of Platyhelminthes. These are acoelomates, i.e. they do not possess any fluid-filled cavity.