Show Agreement To Carry About A Thousand Small Sponges

All sponges have osties, channels that lead inside through the mesohyl, and in most sponges, these are controlled by tubular poroccytes that form lockable inlet valves. Pinacocytes, plate-like cells, form a single-layer outer skin on top of all other parts of the mesohyl that are not covered with choanocytes, and pinacocytes also digest food particles too large to penetrate ostia,[28][30] while those at the base of the animal are responsible for anchoring. .