CONCEPT OF AGING
Today, people are living longer than ever before due to advances in education, technology, medicine, food distribution, and sanitary conditions. So, nowadays, it is not unusual to meet people who are in their 70s, 80s, 90s, and some who are close to 100 years old. However, “adding the years to life,” does not mean that we are also able to “add more life to the extra years.” In other words, living longer does not always mean we will also have better or a good quality of life in later years. Some older adults in late life are healthy and independent and are still very involved in their family and community lives. Then again, it is not unusual to see older persons who can get very ill and are not able to get themselves out of bed. There is no single universally accepted definition of aging. Aging is best looked at as a series of changes that occur over time, contribute to loss of function, and ultimately result in the death of a living organism. The maximal life expectancy for humans tod...