nephrostome
/ˈnɛfrəˌstoʊm/
noun
- A funnel-shaped opening in certain invertebrates (like worms) that helps filter waste from body fluids.
- Scientists observed how the nephrostome directs fluid into the excretory system.
- Each segment of the worm contains a pair of nephrostomes.
- The nephrostome in earthworms collects waste fluids from the body cavity.