膀胱 Urinary bladder
（重定向自Bladder Disease）
膀胱是哺乳动物贮尿的囊状器官，功能是贮藏和排泄小便。
经肾脏过滤之后的含有代谢产物的体液流入膀胱，形成尿液；当排尿时，膀胱壁的肌肉收缩，出口处的括约肌放松。
Bladder Disease
中文百科
英语百科
Urinary bladder 膀胱
（重定向自Bladder Disease）
The urinary bladder is a hollow muscular organ that collects urine from the kidneys before disposal by urination. A hollow muscular, and distensible (or elastic) organ, the bladder sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra. There is no exact measurement for the volume of the human bladder, but different sources mention 500 mL (~17 oz) to 1000 mL (~34 oz).
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