EVERYDAY SCIENCE

Detailed explanation-1: -Spicules: structural elements found in most sponges that provide structural support, like a skeleton. Spicules can be made of silica or calcium carbonate. Collar cell or choanacyte: these cells line the interior of the sponge.

Detailed explanation-2: -The two substances that give sponges support are spongin and spicules. Spongin helps form a fibrous skeleton in the sponge that is a form of collagen protein.

Detailed explanation-3: -The skeletal elements of the sponge are produced by the amoebocytes. The amoebocytes produce spongin, the soft fiber that forms natural bath sponges.

Detailed explanation-4: -Spongocytes are responsible for synthesizing spongins which make up the skeletons of some sponges. What are Sclerocytes Responsible for in Sponges? Sclerocytes are responsible for synthesizing spicules which make up the skeletons of some sponges.