porifera structure
Porifera’s bodies have in them a jelly-like mesohyl sandwiched between two thin layers of cells. Their sponges are unique because unlike most animals they not only have specialized cells but also specialized cells that can transform into other types of cells. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes, and the shapes of their bodies are adapted to maximize the efficiency of the water flow. A sponge’s body is hollow and its structure is held bit eh mesohyl jelly. They all have tunnels in them that lead to the interior of the sponge. Pinacocytes, plate-like cells form a single layer of skin that covers anything that’s not covered by coenocytes, which also cover the inner surface of the sponges. All known living sponges can remold their bodies