Question

The nephridia which are found in a region of intestine are?

• A. Integumentary nephridia
• B. Pharyngeal nephridia
• C. Septal nephridia
• D. Both $\left(1\right)$ & $\left(3\right)$

Answer 1

The correct option is C Septal nephridia

The excretory system in Annelids is made up of many segmentally arranged microscopic coiled tubes called nephridia. In earthworms, there are three types of nephridia.

The septal nephridia are the largest nephridia in earthworms. They are found along the sides of the intersegmental septum from the 15th segment and discharge their excretory products into the lumen of the alimentary canal. Integumentary nephridia are seen scattered on the inner surface of the body wall except on the first two segments.

Pharyngeal nephridia occur in three pairs in the 4th, 5th, and 6th segments.

So, the correct answer is 'Septal nephridia'