The wall of the bladder has layers of tissue:
- Inner layer: The inner layer of tissue is also called the lining. As your bladder fills up with urine, the transitional cells on the surface stretch. When you empty your bladder, these cells shrink.
- Middle layer: The middle layer is muscle tissue. When you empty your bladder, the muscle layer in the bladder wall squeezes the urine out of your body.
- Outer layer: The outer layer covers the bladder. It has fat, fibrous tissue, and blood vessels.
This picture shows the bladder and nearby organs in a man.
This picture shows the bladder and nearby organs in a woman.