Write down four main characters of Platyhelminthes. Give two examples.

Characters of Platyhelminthes:

(i) They have dorso-ventrally flattened body, hence are called flatworms.

(ii) Flatworms are bilaterally symmetrical, triploblastic and acoelomate animals.

(iii) They are either freeliving or parasitic.

(iv) Hooks and suckers are present in the parasitic forms.

Examples- Taenia (Tapeworm), Fasciola (Liver fluke).