plural nephridia

What Is Nephridia And Its Function? 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. What is the function of nephridia in annelids? Nephridia, coiled tubular duct-like organs, filter and remove waste from an earthworm’s body. What