SIU / SCIENCE PHOTO LIBRARY SIU / SCIENCE PHOTO LIBRARY
Urinary system. Gross specimen of a healthy human bladder (bottom) with ureters (middle) and kidneys (top). The bladder is a hollow muscular organ located behind the pelvic bone. It can hold around half a litre of urine, which drains into it from the kidneys and through the ureters. The kidneys filter the blood, removing harmful toxins, waste products and excess water. This specimen is from a man.
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