What are the organs of the simple excreretorysystems of earthworm's called?

The organs of the simple excretory system in earthworms are called nephridia. Each segment of the earthworm contains a pair of nephridia, which function to filter and excrete waste products from the coelomic fluid. The nephridia help maintain osmoregulation and eliminate nitrogenous waste, primarily in the form of ammonia. This efficient system allows earthworms to thrive in their moist soil habitats.