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Phylum-annelida - GENERAL CHARACTERS, CLASSIFICATION AND METAMERISM OF ANNELIDA
Course: Economic Zoology
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University: Gulbarga University
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Zoology notes on phylum-Annelida
AYESHA PARVEEN (B.Sc,B.Ed,MBA) Page 1
Phylum Annelida is a very broad phylum belonging to the kingdom Animalia.
The Annelids are found in aquatic as well as terrestrial environments. These are
bilaterally symmetrical invertebrate organisms. Their segmented body
distinguishes them from any other organism.
Phylum Annelida
The characteristics of the organisms present in the Phylum Annelida are as
follows:
1. The Annelids are coelomate and triploblastic.
2. They exhibit organ system level organization.
3. Their body is segmented.
4. They respire through their body surface.
5. Nephridia are the excretory organs.
6. They have a well-developed circulatory and digestive system.
7. Their body contains haemoglobin, which gives them a red colour.
8. Regeneration is a very common characteristic of the Annelids.