Urinary bladder Urinary bladder The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination. In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra. The typical human bladder will hold between 300 and (10.14 and ) before the urge to empty occurs, but can hold considerably more. In humans, the bladder is a hollow muscular organ situated at the base of the pelvis. Urine
Bladder pipe only distinction being the form and size of the air-chamber, either the bladder or the wind-cap, in which the reed was set in vibration. The player blows air into the bladder through the insufflation tube, or through the raised, slit-shaped opening of the wind cap, placed against the player's lips. This earlier Italian form of bladder pipe is found illustrated at the end of the 15th century in the Book of Hours, known as the "Sforza Book". An allusion to the bladder pipe occurs in an old English ballad: This excerpt suggests the early English bladder pipe retained a distinct