Neurosecretion in posterior pituitary gland, TEM
Coloured transmission electron micrograph (TEM) of the posterior pituitary gland showing axons (red) of hypothalamic neurons (nerve cells) full of neurosecretory granules containing oxytocin and vasopressin. Among them there are pituicytes (light green), a specialised glial cell, that may show lipid droplets (dark blue), a feature typical of pituicytes. The basement membrane is pink., by JOSE CALVO / SCIENCE PHOTO LIBRARY
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