Obese Abdomen with Visceral Fat, cross section : Visceral fat is found deep inside your abdomen, surrounding your vital organs. It's different from subcutaneous fat, the kind that's just under your skin. Too much visceral fat physically crowds your organs and your diaphragm. This can restrict your organs' blood supply and make it difficult for you to breathe deeply. Visceral fat secretes dangerous hormones and inflammatory chemicals. The blood that circulates through visceral fat goes directly into your liver through the portal vein. That means the substances your visceral fat produces all pour directly into your liver and into your bloodstream. Scientists think this may have important, and damaging, consequences, such as creating systemic inflammation.
In biology, adipose tissue /ˈædɨˌpoʊs/ or body fat or just fat is loose connective tissue composed mostly of adipocytes. In addition to adipocytes, adipose tissue contains the stromal vascular fraction (SVF) of cells including preadipocytes, fibroblasts, vascular endothelial cells and a variety of immune cells (i.e. adipose tissue macrophages (ATMs)). Adipose tissue is derived from preadipocytes. Its main role is to store energy in the form of lipids, although it also cushions and insulates the body. Far from hormonally inert, adipose tissue has, in recent years, been recognized as a major endocrine organ, as it produces hormones such as leptin, estrogen, resistin, and the cytokine TNFα. Moreover, adipose tissue can affect other organ systems of the body and may lead to disease. Obesity or being overweight in humans and most animals does not depend on body weight, but on the amount of body fat—to be specific, adipose tissue. The two types of adipose tissue are white adipose tissue (WAT) and brown adipose tissue (BAT). The formation of adipose tissue appears to be controlled in part by the adipose gene. Adipose tissue – more specifically brown adipose tissue – was first identified by the Swiss naturalist Conrad Gessner in 1551.
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