NEET BIOLOGY

Detailed explanation-1: -The pores through which water enters are known as ostia and pores through which water goes out are known as osculum. Members of porifera are commonly known as sponges.

Detailed explanation-2: -From Latin porus (“pore”) +-fera (“bearing”).

Detailed explanation-3: -The name porifera means ‘pore bearer’ in Latin (a pore is a tiny hole). A sponge’s body is covered by a skin, one cell thick. This skin has lots of small pores and a few large openings. The small openings are the entrances to a complex system of channels.

Detailed explanation-4: -The scientist R. Grant used the term phylum-Porifera for the first time in 1836. Phylum-Porifera belongs to the sub-kingdom Parazoa. Although all the animals of Porifera are multicellular, the cells that make up the body do not form tissues and organs.