Chloragogen cells are excretory in function. The chloragogen cells take up excretory matter from the blood capillaries of the gut and from the coelomic fluid of the coelom. When these cells are filled with excretory matter, they are either taken by the septal nephridia or pass directly to the outside on the surface of the skin through the dorsal pores. They also store glycogen and fat. Thus these cells are analogous to the liver of vertebrates.