]], 1973.]]Death is the end of the life of a biological organism. Death may refer to the end of life as either an event or condition. Many factors can cause or contribute to an organism's death, including predation, disease, habitat destruction, senescence, malnutrition and accidents. The principal causes of human death in developed countries are diseases related to aging. Traditions and beliefs related to death are an important part of human culture, and central to many religions. In medicine,