Ureter

Definition

The ureter is a muscular tube that transports urine from the kidneys to the urinary bladder. Each kidney has one ureter, and they play a crucial role in the excretory system.

5 Must Know Facts For Your Next Test

1. The ureters are approximately 25-30 cm long in adults.
2. Ureteral peristalsis is the rhythmic contraction that propels urine toward the bladder.
3. The inner lining of the ureter is made of transitional epithelium, which allows it to stretch as urine passes through.
4. A condition called hydronephrosis can occur if there is an obstruction in the ureter, causing urine to back up into the kidney.
5. The point where each ureter enters the bladder is called the ureterovesical junction.

Review Questions

• What type of tissue lines the inner surface of the ureter?
• How do ureters contribute to urine transport?
• What complications can arise from an obstructed ureter?

Related terms

Kidney: An organ responsible for filtering blood and producing urine.

Urinary Bladder: A hollow organ that stores urine until it is expelled from the body.

Peristalsis:

The wave-like muscle contractions that move substances through tubular structures such as the digestive tract and ureters.