How are canals in canal system connect spongocoel to the outside?

animal-kingdom
cbse

#1

How are canals in canal system connect spongocoel to the outside? What is the role of choanocytes in maintaining water flow?


#2

The canals connect the spongocoel to the outside through ostia. The canals are generally lined by choanocytes. The continuous beating of flagella of choanocytes maintain a steady current of water through the canals.