![]() … Porocytes control the flow of water through pores in the sponge body. What are spicules and Spongins what are its role in the Poriferan body?Īmoebocytes can also give rise to sclerocytes, which produce spicules (skeletal spikes of silica or calcium carbonate) in some sponges, and spongocytes, which produce the protein spongin in the majority of sponges. True spongin is found only in members of the class Demospongiae. It is secreted by sponge cells known as spongocytes. ![]() Spongin, a modified type of collagen protein, forms the fibrous skeleton of most organisms among the phylum Porifera, the sponges. The sharp spicules and the softer spongin are arranged in a complex three-dimensional latticework that holds up the cells and gives the sponge its shape. Like all skeletons, they support the soft tissues of the body. Answer: Spongin and sponge spicules are the skeletal structures of the sponge body.
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