The sponge body is comprised of a couple different cell types that form the outside and inside layers of the body wall.
no body cavity
3 True/False Questions
What kind of feeding? → Sponges are sessile (sedentary), filter feeding animals
• Number of tissue → no true tissue
How do the sponges have structure and strength? → Extracellular protein fibers give structure and strength to the sponge body and spicules, spines made of silica or calcium carbonate, offer protection from predation.