What are sponges epidermal cells?

Sponges have a simple body structure, and their epidermal cells form the outer layer known as the pinacoderm. These cells, called pinacocytes, serve as a protective barrier and help regulate the flow of water into the sponge's body. Unlike typical epithelial cells, pinacocytes can change shape and are involved in maintaining the sponge's structure and facilitating nutrient uptake. They play a crucial role in the sponge's overall function and ability to filter feed.