JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Light micrograph showing two phases of developing glomeruli. At top, glomeruli show immature capillary loops covered by a dark crescent of podocytes which bulge into the Bowman's space. In the bottom half, the capillary loops are more differentiated, and renal tubules appear among glomeruli. Magnification: x180 when printed at 10 centimetres wide.
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