How we can live longerIntroduction:I. Why we ageA. Theories of aging II. What is longevityA. Lifespan and life expectancyIII. What determines longevityIII. Why Most Americans Don't Live Beyond Average Life ExpectancyIV. Main causes of death (table)V. What do we do to live longer Conclusion: Introduction What is the fear of most human beings? The fear is aging and death. In this article, you will find out many things about aging. You will learn what longevity is, what determines it, the average lifespan and how you can overcome it. You will find it amazing that doing simple things every day will help you feel better and live longer. Why do we age? From the moment we are born we begin to die. This is life. No one knows how long they will live, but we can try to do everything we can to live longer. Aging is not controlled by anyone. Aging is a genetic process. We get so old to the point where our bodies fail. What causes the body to collapse, decline in energy, fail to function. There is nothing that completely explains why we age, but there are some theories that will help explain what happens. Theories of Aging The genetic theory states that cells contain “aging” genes that indicate the exact number of times the cell can duplicate itself, for humans approximately 110-120 years. Another theory suggests that cellular DNA somehow becomes defective after a certain point and synthesizes defective proteins. The defect disables the cells' normal functioning, causing the cell to deteriorate or break down. Immune system malfunctions are a theory of aging that involves the immune system. . middle of sheet ......work: Salem Press.A signed article in a magazineMcCartney, K. (1984). The effect of a quality daycare environment on children's language development. Developmental Psychology, 20, pp. 244-60. A signed article in a monthly magazine Beardsley, T. (1994). For whom the bell curve really rings. Scientific American, January 1995, volume 272, number 1, pp. 2-5pm. A signed article in a newspaper Moore, M. (1994, December 27). The speculation bothers Flores. Journal American, Section D, p. 1.An unsigned article What Vietnam did to us. (1981, December 14). Newsweek, pp. 46-97. A film or videotape Hand, D. (Supervising Director) and Disney, W. (Producer). (1937). Snow White and the Seven Dwarfs.[Videocassette]. Burbank, CA: The Walt Disney Company. Computer software Microsoft Works for Windows 95 (1995). [Computer program]. Redmond, WA: Microsoft.