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Brown (multilocular) adipose is found in newborns and is capable of fueling
generation of a significant amount of heat. Brown adipose tissue stores
lipid in multiple small vesicles, giving the cytoplasm a vacuolated appearance.
They also have a large amount of cytoplasm which stains darkly due to the
presence of many mitochondria. The tissue is also very vascular. At high
magnification, the nuclei of brown adipocytes (arrow) are seen to be eccentrically
located within the cell, and are surrounded by a significant quantity of
eosinophilic cytoplasm. The stored lipid is contained within multiple droplets,
which have been dissolved away during fixation. |
