Question

What is meant by annelida?

Answer 1

Annelida:

1. The term Annelida is derived from the Latin name annulus which means a small ring.
2. It is a phylum that shows protostome development in the embryonic stage.
3. The organisms belonging to the phylum Annelida are known as annelids.

Characteristics of annelids:

1. Annelids are also referred to as segmented worms.
2. They are widely present in marine, terrestrial, and freshwater habitats.
3. The examples for phylum Annelida are earthworms, leeches, and polychaetes worms.
4. The annelids are coelomate and triploblastic.
5. They exhibit organ system-level organization.
6. Nephridia is the excretory organ.
7. They have well-developed circulatory and digestive systems.
8. They are bilaterally symmetrical.