also: かんこう
noun
Technical term in anatomy for the interior space of a tubular structure, such as a blood vessel or intestine.
血管の管腔が狭くなると血流が悪くなる。
When the lumen of a blood vessel narrows, blood flow worsens.
腸の管腔には消化された食物が通る。
Digested food passes through the intestinal lumen.
Compound of 管 (tube) and 腔 (cavity), directly corresponding to the anatomical concept of a lumen.