In the stomach, food tends to hang around for a little longer and this depends on a variety of factors including the amount of food you have consumed, how much fat it contains, and also the acidity of the stomach. However, all food should have left the stomach within 2 to 4 hours.
Many factors can affect body temperature. Illness, Disease and Trauma. Fever can be caused by infection or illness; this is the bodyâs way of fighting the infection. Certain diseases, such as arthritis, hyperthyroidism and leukemia may also cause elevated body temperature.
The skin is vital to good health because of its ability to regulate  body temperature. The hypothalamus signals the sweat glands to  begin producing perspiration when the bo â¦ dy temperature rises above  normal (approximately 98.6 degrees Fahrenheit). As the perspiration  evaporates from the surface of the body, cooling results. In  addition, during increased body temperature, the blood vessels near  the surface of the skin dilate to release heat to the exterior of  the body; conversely, if the body is too cool, these vessels  constrict to decrease heat loss.