Describe the structure and functions of collar cells in spon

Describe the structure and functions of collar cells in sponges.

Solution

Sponges are covered with tiny pores called which leads to a system of internal canals . the canals eventually lead to one or more larger holes called oscula. The canals of sponges have chambers lined with collar cells. Collar cells are also called choanocytes.

Structure - collar cells have a sticky funnel-shaped collar and a hair-like whip that is called the flagellum.

Choanocytes or collar cells are the third layer that make up a sponge. The first layer gives sponges their pores, and the second layer gives sponges their shape. The cells in the second layer are a mix of mobile and skeletal cells. The mobile cells, called amoebocytes, work in concert with the choanocytes to feed the sponge. They digest the food that the choanocytes provide for them and transport oxygen throughout the body.

Function-Collar cells beat their flagella back and forth to force water through the sponge.Collar cells also pick up tiny bits of food brought in with water.