Question

The correct flow of water current in sponges is

• A. ostia → osculum → spongocoel → outside
  
• B. osculum → spongocoel → ostia → outside
  
• C. ostia → spongocoel → osculum → outside
  
• D. osculum → ostia → spongocoel → outside

Answer 1

The correct option is C ostia → spongocoel → osculum → outside


Water canal system is unique to sponges. It is a system of pores through which water enters and leaves the body of a sponge.

It helps in food gathering, respiration, excretion and reproduction.

Water enters through ostia (inlet pore) into spongocoel and then passes through canals and finally leaves the body through osculum (outlet pore).