# What is the bladder?

The the bladder is called the urinary bladder. Gray's Anatomy (1918) describes it as a hollow, muscular sac.

## What it means

- A hollow, muscular sac.
- Stores urine until it is voided.
- Its wall is highly stretchable; an adult bladder can hold about 400-500 mL.

## Action steps

1. In the lower pelvis, behind the pubis.
2. In front of the rectum in the male and of the uterus in the female.
3. Sits on the pelvic floor.

## Sources

- [Gray's Anatomy of the Human Body (1918)](https://www.bartleby.com/107/)

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