What is the function of the nephridium?
nephridium, unit of the excretory system in many primitive invertebrates and also in the amphioxus; it expels wastes from the body cavity to the (usually aquatic) exterior. Do humans have nephridia? Nephridia are analogous to nephrons or uriniferous tubules found in the kidney of humans. … The nephridium consists of an opening called the nephrostome,…