The excretory organs of earthworms are called nephridia, they play a role in earthworm excretion and osmoregulation functions.
Their location in the body is divided into three categories: Septal nephridia, Integumentary nephridia, and Pharyngeal nephridia.
The invertebrate nephridium, also known as nephridia, is an organelle found in joints and functions similar to the kidneys of vertebrates (which arise from chordate nephridia).
Nephridia clean the body of an animal from metabolic waste.
Metanephridia and protonephridia are the two main types of nephridia.
The clade Nephrozoa includes all animals that contain nephridia and kidneys.
Humans have kidneys that are responsible for eliminating the body's metabolic wastes.