(N/A) Septal nephridiumPharyngeal nephridiumThey are present on both sides of intersegmental septa behind the $15^{\text{th}}$ segment. They open into

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(N/A) Septal nephridiumPharyngeal nephridiumThey are present on both sides of intersegmental septa behind the $15^{\text{th}}$ segment. They open into the intestine.They are present as three paired tufts in the $4^{\text{th}}$,$5^{\text{th}}$,and $6^{\text{th}}$ segments.

Class 11 Biology Structural Organisation in Animals Anatomy of Earthworm

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Distinguish between the following: Septal nephridium and pharyngeal nephridium.

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Solution

(N/A)

Septal nephridium	Pharyngeal nephridium
They are present on both sides of intersegmental septa behind the $15^{\text{th}}$ segment. They open into the intestine.	They are present as three paired tufts in the $4^{\text{th}}$,$5^{\text{th}}$,and $6^{\text{th}}$ segments.

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Chapter

Structural Organisation in Animals

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Anatomy of Earthworm