From Longman Dictionary of Contemporary Englishthe digestive/reproductive/urinary etc tractthe digestive/reproductive/urinary etc tractHBa system of connected organs that have one main purpose in a part of your body → tract
Examples from the Corpus
the digestive/reproductive/urinary etc tract• There may be much urging to urinate, smarting, stinging, burning along the urinary tract.• It is rare, however, for the urinary tract to be affected.• Because it dissolves easily in water, it is rapidly absorbed from the digestive tract and mixes easily with blood.• Or it could simply be activity in the digestive tract.• This is a cleansing agent of the digestive tract and it also aids digestion.• This can have devastating consequences, and may cause long-term damage to the urinary tract.• Obstruction covered all mechanical obstruction to the urinary tract, excluding prostatic disease. 