Kidney tubule, SEM

Kidney tubule, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Kidney tubule. Coloured scanning electron micrograph (SEM) of the surface of a proximal convoluted tubule in the kidney. The proximal convoluted tubules function to reabsorb water, glucose and other small molecules from the filtrate, producing a concentrated urine. The tubules are lined with cuboidal epithelial cells (brown). These cells are covered in many finger- like projections known as microvilli (white and green), which serve to increase the cell's surface area for reabsorption. The reabsorbed molecules move into the interstitial fluid of the kidney and are absorbed back into the blood. The liquid in the tubules passes to the bladder. Magnification: x3300 when printed 10cm wide.

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Keywords: anatomy, biological, biology, coloured, concentrate, concentration, cuboidal, epithelia, epithelium, false-colour, false-coloured, histological, histology, human body, images, kidney, lumen, magnified image, microscopic photos, microvilli, microvillus, physiological, physiology, proximal convoluted tubule, reabsorption, renal, scanning electron micrograph, scanning electron microscope, sem, subjects, tubules, urinary system

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