The body starts losing its lean muscles. Body organs like the liver and kidneys start losing some of their cells. This causes weakness, morbidity, and disability.
In the 40s and beyond, due to changes in bones, muscle and joints the body loses about half an inch height every 10 years. (3)
Aging results in a decrease in cardiac output, increased blood pressure and arteriosclerosis. The lung’s gas exchange is impaired and expiratory flows slow down. Changes in collagen and elastin result in changed skin tone and loss of skin elasticity. (4)