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 is
- A hollow, muscular sac.
- Stores urine until it is voided.
- Its wall is highly stretchable; an adult bladder can hold about 400-500 mL.
Where it is
- In the lower pelvis, behind the pubis.
- In front of the rectum in the male and of the uterus in the female.
- Sits on the pelvic floor.
Source:
Last verified: 2026-07-18
- Best Anatomy Answers is an educational reference about human anatomy. It is not medical advice — for any health concern, talk to a licensed medical professional.