Over the next four decades, this population is projected to more than quadruple. Because of increases in life expectancy at older ages, people 90 and older now comprise 4.7 percent of the older population (age 65 and older), as compared with only 2.8 percent in 1980. By 2050, this share is likely to reach 10 percent.
As a person. Age, change, and sales are accompanied by loss of function and abnormal function. As a result, air-altered membrane cells lose their ability to function. The membranes change so much that the transport of oxygen and nutrients, and the removal of carbon dioxide and waste products are not very efficient, which can lead to illness.
changes that occur in cells as a person ages:
Aging causes changes in cell membranes, transporting oxygen and nutrients to cells, and removing carbon dioxide and waste products from cells is less efficient in the elderly. Cells can begin to function abnormally, leading to diseases associated with aging, such as arthritis, memory loss, and some cancers
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