Brown adipose tissue (BAT) or brown fat makes up the adipose organ together with white adipose tissue. Brown adipose tissue is found in almost all mammals.
Brown adipose tissue in a woman shown in a FDG PET/CT exam
Micrograph of a hibernoma, a benign tumour thought to arise from brown fat (haematoxylin and eosin stain)
White adipose tissue or white fat is one of the two types of adipose tissue found in mammals. The other kind is brown adipose tissue. White adipose tissue is composed of monolocular adipocytes.
Distribution of white adipose tissue in the human body.