The ciliated funnel-shaped inner opening of a nephridium into the coelom in some invertebrates and lower vertebrates.肾孔，肾口一些无脊椎动物和低等椎动物体内通向体腔的肾管纤毛，漏斗形，内部开口。
The ciliated funnel-shaped inner opening of a nephridium into the coelom in some invertebrates and lower vertebrates.肾孔，肾口一些无脊椎动物和低等椎动物体内通向体腔的肾管纤毛，漏斗形，内部开口。
