which type of nephridia are present near the mouth of the earthworm
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Septal nephridia of earthworm are
(a) Responsible for excretion
(b) Present in all body segments
(c) Responsible for keeping the surface moist
(d) Present in 4, 5, 6 segments
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Hint: Nephridium is a characteristic feature of an earthworm. On the basis of the position of nephritis in the body, it can be divided into-
-Septal Nephridia
-Pharyngeal Nephridia
-Integumentary Nephridia
Complete solution:
The Septal Nephridia of earthworm are ‘responsible for excretion’.
The septal nephridia are the largest nephridia present in an earthworm and are present on both sides of each intersegmental septum after the 15th segment. There are 40-50 septal nephridia present in each septum and they are arranged in two rows. As a result, each septum gets 80-100 septal nephridia. It consists of 3 main parts: