The parenchyma of adipose tissue consists of adipocytes suspended in a connective tissue matrix, which functions as both a crucial endocrine organ as well as a site for metabolic activity. Two types of adipose tissue have been identified: brown and white. Brown adipose tissue (BAT) in humans is present at birth and provides non-shivering heat generation, while white adipose tissue (WAT) is present in adults and is a highly metabolic, endocrine organ. Pathology can occur both from adipose tissue deficiency as well as excess.

Brown Adipose Tissue (BAT)

Non-shivering thermogenesis. Brown adipocytes utilize oxygen and lipids as substrates to produce heat. The functional thermogenic unit consists of a brown adipocyte maintained within a structural network of connective tissue with access to a rich blood supply and innervation. ...

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