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Urinary bladder

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In the anatomy of mammals, the urinary bladder is the organ that collects urine excreted by the kidneys prior to disposal by urination. Urine enters the bladder via the ureters and exits via the urethra.

Anatomy

The urinary bladder is a hollow, muscular and distensible organ that sits on the pelvic floor (superior to the prostate in males). On its anterior border lies the pubic symphysis and, on its posterior border, the vagina (in females) and rectum (in males). The urinary bladder is normally capable of storing 400-500 millilitres of urine, but because it is made up of transitional epithelium it is able to stretch to volumes of even several litres.

The ureters enter the bladder diagonally from its dorsolateral floor.

Diseases of the bladder

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Urinary system

Kidneys - Ureters - Urinary bladder - Urethral sphincters - Urethra

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