Question

Nephrostome occurs in earthworm

• A. Septal nephridia
• B. Integumentary nephridia
• C. Pharyngeal and septal nephridia
• D. Pharyngeal and integumentary nephridia

Answer 1

The correct option is A Septal nephridia

In earthworm septal nephridia occur on the inter-seg­mental septum between 15th and 16th segments to the posterior side of the body. Each septal nephridium consists of nephrostome, neck, the body of nephridium and the terminal duct. It is also known as ciliated funnel or nephrostome. It is the proximal flattened funnel-shaped structure of the nephridium lying in the coelom.

So the correct answer is 'Septal nephridia'.