Question

forests of Nephri dia and
are ,
What are
name The segments
in which they
present​

Answer 1

Answer:

The excretory organs are not well developed in the lower organism. The annelids have nephridia as major excretory organs. Nephridia are the excretory organs of earthworm, which are of three types, namely, septal, integumentary and pharyngeal. Integumentary nephridia lie scattered in the body wall of each segment, except the first two.  There are 200-250 nephridia in each segment but on clitellum, their number increases to 2000-2500 per segment, which is called the forest of nephridia. These nephridia lack nephrostomes and their terminal ducts open on the body surface.