Ureters

The ureters are long, narrow tubes that carry urine from the kidneys to the urinary bladder. They are a crucial part of the urinary system, which is responsible for removing waste and maintaining the body's fluid balance.

Structure of Ureters

The ureters are approximately 25-30 cm long and about 3-4 mm in diameter. Each ureter is made up of three layers: the inner mucosa, the middle muscular layer, and the outer fibrous layer. The muscular layer contracts to propel urine from the kidneys to the bladder through a series of rhythmic peristaltic contractions.

Function of Ureters

The primary function of the ureters is to transport urine from the kidneys to the urinary bladder. The peristaltic contractions of the ureter muscles help push urine down the tubes and prevent backflow of urine into the kidneys.

Study Guide

1. What is the function of the ureters?
2. Describe the structure of the ureters.
3. How do the muscles in the ureters help in moving urine?