JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Kidney lobule of a 20 weeks foetus showing a cortex and medulla well defined. The nephrogenic zone can be seen at the periphery of the cortex as a basophilic band. Developing glomeruli can be recognized under the nephrogenic zone. Magnification: x36 when printed at 10 centimetres wide.
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