Cell loss has Resulted in Stoppage of a Vital Process

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It is an everyday observation that animals are born, grow, and mature then begin to lose some of their capabilities, and finally die. This loss of capabilities is progressive, irreversible, and common for all members of a species and is called aging. In humans it shows in many ways, some very visible: decline in height, shrinkage of muscle, thinning and graying of hair, and wrinkling of skin. Internally, and even more significantly, there is the progressive loss of cells in the brain, kidneys, and other vital organs. This cell loss has resulted in stoppage of a vital process. Whatever the reason, important issues ranging from the muscles to the brain shrink and become less competent with age. Many of these changes are reflected in functional declines. Not only do nerve cells at levels from the brain to the spinal cord diminish, but also those that remain conduct impulses at a slower rate so that the reaction time of the older animal is slowed. Memory often shows a decline.

Another widespread decline is in the loss of cells involved in the hearing process. The loss is most marked for high pitches and may require the assistance of a battery-operated hearing aid. More subtle are such declines as those in the processes involved with being immune to disease, which result in a lessened ability of the older organism to cope with infection. Indeed, pneumonia is one of the most common causes of death among the elderly population of most nations.

Mixed with true aging processes are disease processes that may be so common as to be mistaken for aging. For instance, the buildup of deposits of fatty materials in arteries tends to be progressive with aging; everything else being equal, the narrowing of arteries results in such serious illnesses as stroke or heart attack, occurring with increasing frequency as an individual ages.

It is now recognized that atherosclerosis is the result of many factors, not only genetic but also environmental high blood pressure, high saturated-fat diets, and smoking, the effects of which become more obvious with the passage of time. It is therefore an age-related, but not a universal aging, process and can thus usually be controlled.

The aging skin aging is one of the important external performance, has caused the scientific gerontology and skin. The skin cells in vitro aging skin aging body part can reflect the situation. While in the skin model of senescence also has attracted people's attention, because the epidermis cutin form skin aging process in the important role as dermal fibroblasts as increasing attention. Accelerate skin aging research related to clarify the skin aging mechanisms for elderly dermatology, to provide the scientific basis for the development of medicine and clinical guidelines, prevention of skin diseases. Aging is refers to the airframe organ for environmental change with the age growth dropped gradually adaptability, easy cause death or sickness. Aging is part of the process of the reservation regulation of genes, Part of the internal and external: "wear and tear" consumption, performance in the cellular and molecular level. The skin can provide a good place on aging, because it helps to superficial exposed cellular and molecular level research body aging. Anyhow, skin aging research, especially about the study of natural aging skin deeply, its occurrence, development of don't know much about the mechanism. The prevention and treatment of skin aging, only by retinoic acid treatment shall be acknowledged retinoic acid skin ageing cutin light and excessive proliferative disease has certain effect, can reduce the skin surface roughness, reduce wrinkle, reduce the skin pigmentation, histologically can increase the granular layer of cells, increasing the thickness of the epidermis layer. But the natural aging skin effect is not significant. Accelerate skin aging research is not only related to clarify the skin aging mechanism, but also for the development of elderly dermatology, can provide scientific basis for clinical medicine into a step and skin disease prevention.

Research report, the ageing is divided into two kinds: one kind is old age, the age of natural growth, Another kind is biological aging, namely inner cell aging. But now there are more and more evidence that heart disease and certain types of cancer with ageing related diseases, and biological aging close relationship. In recent years, scientists will focus on the research on biological aging area, which is the human cells in chromosomes.

Article Source: http://depositarticles.com/

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