Question

name the following;-
cell contrets water flow through Ostia-------
​

Answer 1

Answer:

Choanocyte Cell

→ The action of the choanocyte flagellum in generating a low pressure to draw water through the collar .

→ Water enters the body of sponges through ostia and reaches spongocoel. From spongocoel, water flows out of body to the exterior through osculum.

Hence, in canal system of porifera, the pathway of water flow is :  

Ostia →→ Spongocoel →→ Osculum →→ Exterior'.

Explanation: