Question

excretory system in annelide​

Answer 1

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Because one-celled organisms are in

contact with their environment, they do not need excretory organs.

Fluid from the excretory tubules leaves the body through pores.

In earthworms, members of the phylum Annelida, the excretory system consists of structural units called nephridia (the singular is nephridium).

The annelid excretory system is made up of long tubular organs called nephridia. As body fluids travel through the nephridia, both nutrients that are useful to the organism and water are reabsorbed, leaving behind concentrated waste fluid that is excreted through the nephridiopore

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Answer 2

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$\huge\mathbb{\red{ Excretory\: sys. \: of \: Annelide}}$

The annelid excretory system is made up of long tubular organs called nephridia. Many species have a pair of nephridia in each segment. The nephridia each have an opening called a nephrostome that takes in body fluids from the coelom, and an exit pore in the body wall called the nephridiopore releases waste from the worm. As body fluids travel through the nephridia, both nutrients that are useful to the organism and water are reabsorbed, leaving behind concentrated waste fluid that is excreted through the nephridiopore. The nephridia are lined with short, hair-like projections called cilia that beat repeatedly to maintain the flow of fluid through the organ.

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