urinary tract n.
The passage from the pelvis of the kidney through the ureters, bladder, and urethra to the external urinary opening.
| urinary tract The series of organs in the urinary system in which urine is formed and excreted. In most vertebrates, the urinary tract consists mainly of the kidneys, ureters, and bladder. In most mammals, and some fish and birds, the urinary tract also includes the urethra. |
The body parts involved in the elimination of urine. The ureters, urethra, and urinary bladder are all part of the urinary tract.