<p><strong>Fig. 3.20.</strong> Cells in a sponge (<strong>A</strong>) Choanocyte, (<strong>B</strong>) Amoebocyte (<strong>C</strong>) Porocyte (<strong>D</strong>) Epithelial cells.</p>

Fig. 3.20. Cells in a sponge (A) Choanocyte, (B) Amoebocyte (C) Porocyte (D) Epithelial cells.

Image courtesy of Xvasquez and Lilyu, Wikimedia Commons