A diagram of the inner organs of an annelid worm showing the metanephridia and both nephrostomes in one of the animal's segments

The nephrostome[1] is the funnel-like component of a metanephridium. It is always oriented towards the coelom. The nephrostome is covered from the inside with cilia, which push the water, metabolic wastes, unnecessary hormones and other substances into the metanephridium.

References

  1. "Archinephros | anatomy | Britannica". www.britannica.com. Retrieved 2023-02-07.


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