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Question

Nephrostome occurs in earthworm

Septal nephridia
Integumentary nephridia
Pharyngeal and septal nephridia
Pharyngeal and integumentary nephridia

A

Septal nephridia

B

Integumentary nephridia

C

Pharyngeal and septal nephridia

D

Pharyngeal and integumentary nephridia

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Solution

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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'.

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