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How many types of nephridia are present in the earthworm?

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in Biology – Class 11 by (272k points)
How many types of nephridia are present in the earthworm?

(a) One

(b) Two

(c) Three

(d) Four

The question was posed to me by my college professor while I was bunking the class.

The origin of the question is Animals topic in division Structural Organisations in Animals of Biology – Class 11

1 Answer

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Best answer
Correct answer is (c) Three

Explanation: The excretory organs of earthworm occurs as segmentally arranged coiled tubules called nephridia. They are of three types –

i. Septal nephridia

ii. Integumentary nephridia

iii. Pharyngeal nephridia.

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