Short Class Notes On Phylum Annelida

Phylum Annelida –

- Aquatic or terrestrial.

- Free living or parasitic.

- Organ system level body bilateral symmetry and Triploblastic  coelomate.

- Metameric segmentation.
- Nephridia for excretion.

- Ventral double Nerve cord.

- Monoecious or Dioecious.

- Reproduction – Sexual.

- eg. Earthworm(Pheretima),Nereis etc.