Question

Clitellum of Pheretima is primarily concerned with

• A. Copulation
• B. Production of cocoons
• C. Excretion
• D. Burrowing

Answer 1

Answer: (B)

Production of cocoons

Clitellum of Pheretima is primarily concerned with the production of cocoons. The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited. It is present about 2 cm (0.79 in) behind the anterior end of the body (around the 14${}^{th}$, 15${}^{th}$ and 16${}^{th}$ segments).