DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Light micrograph (LM) of Ammonium urate crystals. This is a salt of uric acid that often forms stones or uroliths in the urinary system. Uric acid is an end product of nitrogen metabolism in the human body (the main product being urea), and is found in small amounts in urine. The disease gout in humans is associated with abnormal levels of uric acid in the urinary system. Saturation of uric acid in the human blood stream may result in one form of kidney stones when the acid crystallizes into a solid inside the kidney. Magnification: x80 when shortest axis printed at 25 millimetres.
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