PHYLUM PORIFERA

• I Characteristics• 1. Radial symmetry• 2. Diploblastic• 3.Reproduction by asexual &

sexual means.• 4. Body wall pierced by

numerous pores• 5.Internal skeleton

Porifera contd.

• 6 Choanocytes• 7 Most marine; a few fresh water• 8. Grouped according to spicules• 9. Non motile, aquatic filter

feeders.• 10 Usually slimy to the touch and

may have an unplesant odor.