Diversity in the Living World

Phylum Annelida (Segmented Worms)

Earthworm

Occur in moist soil, fresh water and sea.

Body is soft and segemented, triploblastic with bilateral symmetry.

First animal with the coelom (body cavity).

Body is covered by a non-chintinous cuticle which may have chitinous setae, or parapodia.

Reproduction is generally sexual, but some may reproduce asexually by rejuvination i.e, by regrowing broken segments.

Example: Nereis (sand worm), Aphrodite (sea mouse)

Pheretima (earthworm), Hirudinaria (leech)

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	Introduction
	Importance of Classification
	Nomenclature
	Classification of Plants and Animals
	Plant Kingdom
	Animal Kingdom
	Phylum Protozoa (Primitive Animals)
	Phylum Porifera (Sponges)
	Phylum Coelenterata (Cridaria)
	Phylum Platyhelminthes (Flatworms)
	Phylum Aschelminthes (Round or Thread Worm)
	Phylum Annelida (Segmented Worms)
	Phylum Arthropoda (Animals with Jointed Legs)
	Phylum Mollusca
	Phylum Echinodermata
	Phylum Hemichordata
	Phylum Chordata
Animations
	Classification of Plants
	Classification of Animals

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