Question

Region of Earthworm which is forest of nephridia is

• A. Clitellar region
• B. Pharyngeal region
• C. Typhlosolar region
• D. Intestinal region

Answer 1

The correct option is A Clitellar region

In Earthworm each segment of the body from 7th to the last segment, numerous nephridia are found attached inside the lining of the body wall. These are called integumentary nephridia which are about 200-250 in each segment except the segment of the clitellar region where the number 2,000-2,500 in each segment.

These nephridia are small-sized, without nephrostome and without any opening into the coelom. Therefore this region of Earthworm is a forest of nephridia.

So the correct answer is 'Clitellar region'.