Islet of Langerhans. Transmission Electron Micrograph (TEM) of a slice through a cell of the hormone-secreting islet of Langerhans in the mammalian pancreas. The dark round shapes in white spaces are membrane-bound secretory granules. These contain a densely granular core of hormone separated from the surrounding membrane by a clear space. The islets of Langerhans secrete hormones into the blood - mostly insulin and glucagon,which control blood sugar levels. Magnification x60,000 at 7x9 inch size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 3732 px × 4686 px |
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