Question

The part of the alimentary canal that starts from the middle segment of clitellum and extends up to the last segment is

• A. Stomach
• B. Gizzard
• C. Intestine
• D. Rectum

Answer 1

The correct option is C Intestine

The alimentary canal of earthworm has the following parts:

1. Mouth- 1st segment
2. Buccal cavity- middle of 3${}^{rd}$ segment
3. Pharynx- 3${}^{rd}$ to 4${}^{th}$ segment
4. Oesophagus- 5${}^{th}$ to 7${}^{th}$ segment
5. Gizzard- 8${}^{th}$ to 9${}^{th}$ segment
6. Stomach- 10${}^{th}$ to 14${}^{th}$ segment
7. Intestine- 15${}^{th}$ to last segment (middle segment of clitellum starts from 15th segment)
8. Anus- Last segment

The clitellum of earthworm lies in 14${}^{th}$, 15${}^{th}$, 16${}^{th}$, and 17${}^{th}$ segment. From the 15${}^{th}$ segment, the intestine begins and continues till the last segment which ends in the anus.

Hence, the correct answer is 'Intestine'