Question

what is the function of osculum in phylum poriferra

Answer 1

in phylum porifera like sponges "ostia" a pore like structures present all over the body .This absorbs water and nutrients .osculum is a body part in sponges from where the waste material goes out . it acts like a excretory organ.

Answer 2

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The osculum (plural "oscula") is an excretory structure in the living sponge, a large opening to the outside through which the current of water exits after passing through the spongocoel. Wastes diffuse into the water and the water is pumped through the osculum carrying away with it the sponge's wastes.