NEET 2000 Biology question

Primary function of enteronephric nephridia of Pheretima :

(1)Osmoregulation
(2)Excretion of nitrogenous wasteCorrect
(3)Respiration
(4)Locomotion

Answer: (2)

Solution

In the earthworm Pheretima, the enteronephric nephridia are the septal and pharyngeal nephridia, which open into the lumen of the alimentary canal (pharynx and intestine) instead of to the outside. They remove the nitrogenous wastes (mainly urea and ammonia) from the coelomic fluid and blood vessels and discharge them

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Question ID VK-088701