THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys.

Detailed explanation-2: -The ureter is a tube that carries urine from the kidney to the urinary bladder.

Detailed explanation-3: -Each ureter is a small tube, about 25 cm long, that carries urine from the renal pelvis to the urinary bladder. It descends from the renal pelvis, along the posterior abdominal wall, which is behind the parietal peritoneum, and enters the urinary bladder on the posterior inferior surface.