Excess upper abdominal fat may occur from years of poor diet, lack of exercise and stress. Age and genetic factors also play a role in where your body accumulates belly fat. Upper abdominal fat tends to be visceral fat -- the kind of fat that lies between your abdominal wall and your organs.
Skin (percutaneous, dermal) absorption is a term that describes the transport of chemicals from the outer surface of the skin both into the skin and into the systemic circulation. The surface area of an adult is about 20,900 cm3 and the surface area of a child of 6 years is about 9,000 cm3. 2  These figures and figures for other body parts or portions can be found in the EPA Exposures Handbook 1996 or estimated using other databases.
The word hair usually refers to two distinct structures: 1  the part beneath the skin, called the hair follicle, or, when pulled from the skin, the bulb. This organ is located in the dermis and maintains stem cells, which not only re-grow the hair after it falls out, but also are recruited to regrow skin after a wound. the shaft, which is the hard filamentous part that extends above the skin surface.