EVERYDAY SCIENCE

Detailed explanation-1: -In order obtain food, sponges pass water through their bodies in a process known as filter-feeding. Water is drawn into the sponge through tiny holes called incurrent pores.

Detailed explanation-2: -Sponges are a type of suspension feeder, but because they actively pump water through their bodies, they are more specifically called filter feeders. Other examples of filter feeders include clams and mussels. Some suspension feeders, like corals, do not actively pump water through their bodies.

Detailed explanation-3: -Filter feeding is a method some animals use to feed where the animal finds their meal by moving through the water, or taking advantage of water moving by them, and extracting small pieces of food and other particles from the water.

Detailed explanation-4: -Sponges (Poriferans) receive (incoming) food particles with the help of collar cells (choanocytes). These collar cells or choanocytes are surrounded by microvilli which filter the incoming food particles. Therefore, sponges/Poriferans are called filter feeders.