Features of animals related to this phylum are as -
- Body is triploblastic and bilaterally symmetrical.
- Body is metamerically segmented.
- Body cavity is coelom layered by mesoderm.
- Locomotion takes place by setae (in Earthworm) and parapodia (In Nereis).
- Digestive system is complete with mouth and anus.
- Gas exchange takes place through body wall.
- Circulation system is closed.
- Excretion takes place by “nephridia”.
- Some anneilids like Nereis are unisexual while some annelids like Earthworm and Leech are hermaphrodite. Sexual reproduction is seen.
- Examples- Nereis ,Leeches and Earthworms.
Earthworm 
Leech 
Nereis
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