Cellular Aging Essay
Aging can be defined as the time related reduction of the physiological functions that are required by organisms for survival and fertility. It has been defined as the collection of changes that makes human beings gradually more likely to die (Medawar, 1952). Biologist define aging as time dependent or age progressive reduction in intrinsic physiological function leading to a high specific mortality rate and a decrease in specific reproductive rate. Cellular aging therefore, can be described as an increased susceptibility to cell death caused by the loss of cellular functions such as cell division, cell communication, transport and delivery. A cell ages gradually until it gets to the senescence stage which is a process by which a
…show more content…
At early stage of life, aging is associated with growth, maturation and discovery. Many human abilities increase before age 30, while other abilities continue to develop through life. There some changes that occur as one ages that are not necessarily harmful for example hair thins and turns gray, skin thins, becomes elastic and sags. The function of some bodily organs slows down which continues throughout adulthood. The following are the examples of some bodily organs and systems whose functions reduces with age;
In the gastrointestinal system, production of digestive enzymes reduces thereby causing a reduction in the body’s ability to breakdown and absorb the nutrition from food which may not be noticeable until later in life. Scientists put forward the theory that aging likely results from a combination of factors. Genes, lifestyle and diseases can all affect the rate of aging and also that people age at different rates and in different ways. The following are the changes that are obvious during aging;
Eye sight: loss of peripheral vision and reduction in the ability to judge depth, decreased clarity of
At early stage of life, aging is associated with growth, maturation and discovery. Many human abilities increase before age 30, while other abilities continue to develop through life. There some changes that occur as one ages that are not necessarily harmful for example hair thins and turns gray, skin thins, becomes elastic and sags. The function of some bodily organs slows down which continues throughout adulthood. The following are the examples of some bodily organs and systems whose functions reduces with age;
In the gastrointestinal system, production of digestive enzymes reduces thereby causing a reduction in the body’s ability to breakdown and absorb the nutrition from food which may not be noticeable until later in life. Scientists put forward the theory that aging likely results from a combination of factors. Genes, lifestyle and diseases can all affect the rate of aging and also that people age at different rates and in different ways. The following are the changes that are obvious during aging;
Eye sight: loss of peripheral vision and reduction in the ability to judge depth, decreased clarity of