Question

What type of cell lines the inner chamber of sponges?

1) Epithelial cells
2) Muscle cells
3) Nerve cells
4) Connective tissue cells

Answer 1

1) Epithelial cells. The inner chamber of sponges is lined by epithelial cells, specifically pinacocytes.

Step-by-step explanation:

The inner chamber of sponges is lined by epithelial cells. These cells, called pinacocytes, form the outermost layer of the sponge body and serve a protective function. They cover the surface of the sponge and are responsible for allowing the entry of water into the body through pores called ostia. Other cell types, such as porocytes and sclerocytes, also reside in the mesohyl, a jelly-like substance between the outer layer and the feeding chambers of the sponge.