Question

Nephridia of Pheretima are

• A. Meganephridia
• B. Micronephridia
• C. Metanephridia
• D. Both B and C

Answer 1

The correct option is B Micronephridia

Integumentary nephridia: Integumentary nephridia are smallest nephridia of Pheretima. So they are also called as micro nephridia. They lie scattered on the entire internal surface of the body wall except in the first two segments. They are V shaped structures and hang out in the coelom. The number ranges from 200-250 in each segment, except in the clitellar segments. In the clitellar segments they are ten times more than the usual number.

So the correct answer is 'Micronephridia'.