The intestinal excretory organs (septal nephr | vedclass

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Question

(D) In $Pheretima$ (earthworm),nephridia are the primary excretory organs. Septal nephridia,which are located on both sides of the intersegmental sept

Vedclass · Accepted Answer

Excretion of nitrogenous waste

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(D) In $Pheretima$ (earthworm),nephridia are the primary excretory organs. Septal nephridia,which are located on both sides of the intersegmental septa behind the $15^{th}$ segment,open into the intestine. These nephridia are enteronephric,meaning they discharge their nitrogenous waste (primarily urea) directly into the intestinal lumen. This adaptation helps in the conservation of water by reabsorbing water from the waste before it is excreted,thus playing a crucial role in osmoregulation and the excretion of nitrogenous waste.

The intestinal excretory organs (septal nephridia) of $Pheretima$ have a function of:

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