Ageing: Introduction: Aging is defined as the sequential or progressive change in an organism that leads to an increased risk of debility, disease, and death. Senescence consists of these manifestations of the aging process.Aging gracefully' People may use this phrase to mean, 'looking old, but embracing it' or 'showing signs of aging, but still powering forward with life'.Causes of aging :Some aging is caused by the body, such growth spurts children go through during puberty. Aging can also be accumulative, such as the onset of skin damage due to excessive sun exposure. Aging is ultimately a combination of physiological changes