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| The maximum number of years an individual can live. The life span of human beings is about 120 to 125 years of age |
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| The number of years that will probably be lived by the average person born in a particular year. |
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| Leonard Hayflick's theory that the maximum number of times that human cells can divided is about 75 to 80. As we age, our cells have less capability to divide |
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| The average brain loses 5 to 10 percent of its weight between the ages of 20 and 90 |
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| A thickening of the lens of the eye that causes vision to become cloudy, opaque, and distorted |
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| Damage to the optic nerve because of the pressure created by a buildup of fluid in the eye |
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| Inflammation of the joints that is accompanied by pain, stiffness, and movement problems; this disease is especially common in older adults |
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| A chronic condition that involves an extensive loss of bone tissue and is the main reason many older adults walk with a marked stoop. Women are especially vulnerable to this |
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| The label used to describe the onset of alcoholism after the age of 65. Often times related to loneliness, loss of a spouse, or a disabling condition |
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