ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Light micrograph of the cortex of a normal human kidney, showing three glomeruli within a field of convoluted tubules. Each glomerulus is bounded by a clear space, the lumen of the capsule of Bowman. The background shows convoluted tubules outlined by blue lines of fibrous connective tissue. The glomeruli and tubules make up the nephrons, the functioning units of the kidney, which act as filters for the blood stream. Magnification: x50 at 35mm size.
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