4. Diversity In Living Organism
Phylum - Annelida
Phylum - Annelida :
They occur in moist soil, fresh water and sea.
They are elongated, with segmented body and bilateral symmetry.
First animals with true body cavity (coelom).
Body bears lateral appendages for locomotion in the form of chitinous setae or parapodia. Examples :
Nereis (sand worm) Aphrodite (sea mouse), Pheretima (earthworm), Hirudinaria (Cattle leech)