Question

In a sponge, digestion takes place in

• A. Paragastric cavity / Spongocoel
• B. Osculum
• C. Ostium
• D. Food vacuoles

Answer 1

The correct option is D Food vacuoles

A. Paragastric cavity or Spongocoel is the central cavity in sponges. It is lined by choanocytes or collar cells.

B. Osculum is the exhalant pore through which water flows out of the body of sponges.

C. Ostium is the inhalant pore through which water enters the body of sponges.

D. Food vacuoles are present within the choanocytes. Food particles are first taken up by choanocytes which are transferred to food vacuoles and broken down into smaller particles.

Hence, in a sponge, digestion takes place in food vacuoles.

So, the correct answer is 'Food vacuoles'.