The nematode excretory system removes nitrogenous waste and regulates osmotic pressure. It consists of gland, canal, duct, and pore cells. Gland cells secrete materials to help with molting. Canal cells form bridges between excretory canals and contact body fluid. Duct cells connect the canals to the pore cell. Pore cells open to the exterior. Excretory systems vary between parasitic and non-parasitic nematodes. Modifications include H-shaped, rhabditoid, ascaroid, cephaloboid, anisakid, and tylenchid types. The system is significant for osmoregulation, turgor pressure regulation, removing foreign particles,