Give an account on phylum Annelida.

Phylum Annelida:

i. Earthworms, leeches and marine worms belongs to this phylum.

ii. They are segmented worms.

iii. They have a body cavity called coelom.

iv. They have movable bristles called setae which help in their movement.

v. They have a nervous system with brain.

vi. They have Nephridia which help to remove metabolic wastes.

vii. The most common larva is trochopore.

Earthworms

Leech