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老年是一个漫长的过程,它的开始可以追溯到卵子还没有受精以前。衰老有几个特点:(1)它是多细胞生物普遍存在的;(2)是不可逆的;(3)是逐步积累和加重的;(4)是可以预计的.根据各种资料和学说的推论,人类寿命可以长到110岁,在热血动物中年龄最高.一般说来,超过65岁的老年人中,约有30%以上出现各种生理功能的减退。平时尚处于平衡状态,在遇到感染、外伤、以及各种内外环境改变的影响之下,可因适应性不全而影响到生命的安全。在细胞超微结构中,细胞核的老化可出现染色质形态失常(凝块、缩小、碎裂、分解、染色体色
Elderly is a long process that starts with the egg before fertilization. There are several characteristics of aging: (1) it is ubiquitous multicellular organisms; (2) is irreversible; (3) is gradually accumulated and aggravated; (4) is predictable.According to various data and doctrine Corollary, human life expectancy can grow to 110 years old, the highest in the warm-blooded animals.In general, over the age of 65 years old, about 30% of the emergence of a variety of physiological function decline. Under the influence of infection, trauma, and various internal and external environmental changes, flat-skin is in a state of balance, which may affect the safety of life due to incomplete adaptability. In the cell ultrastructure, the aging of the nucleus may present with chromatin dysmorphism (clotting, shrinkage, fragmentation, disintegration, chromosomal color