Phylum Porifera - Biology 2e

Porifera , class: Demospongiae porifera The phylum Porifera is divided into four classes, three of which occur off the coast of the Pacific Northwest Of the three classes present locally, this porifera Porifera have no internal organs, nervous tissue, circulatory system, or digestive systems, making them the most primitive of the multi-cellular

porifera The phylum Porifera is divided into four classes, three of which occur off the coast of the Pacific Northwest Of the three classes present locally, this