UNIQUE
CHARACTERISTICS:
3 CLASSES OF PHYLUM ANNELIDA
-Class Oligochaeta ( earthworm:Pheretima sp.)
-Class Polychaeta ( sandworm : Nereis sp. )
-Class Hirudinea ( leech : Hirudo sp.)
Scientific Name: Pheretima sp.
Class: Oligochaeta
Phylum: Annelida
Kingdom: Animalia
Scientific Name: Nereis sp.
Class: Polychaeta
Phylum: Annelida
Kingdom: Animalia
Scientific Name: Hirudo sp.
Class: Hirudinea
Phylum: Annelida
Kingdom: Animalia
ROLES OF ANNELIDA
(1) Soil aeration
-burrowing activity
-permits greater penetration of air into the
soil
-improves the drainage capacity of the soil
-suitable for growing crop
(2) Medical use
-leeches used to suck blood out of patients
-release anti-coagulant(heparin) to prevent
blood clotting