A Complete Collection of 100000 Whys
Fav十万个为什么
为什么人体会老化？
1、细胞损伤累积：随着年龄增长，人体细胞会不断受到氧化应激、环境污染等因素的损害，这些损伤逐渐累积，导致细胞功能下降。
2、遗传因素：基因决定了人体的寿命和老化速度，某些基因的变异会使个体更容易老化。
3、内分泌变化：随着年龄增长，内分泌系统会发生改变，如激素水平下降，影响新陈代谢和细胞修复能力。
4、免疫系统衰退：免疫系统的功能会随着年龄增长而减弱，导致身体对感染和疾病的抵抗力下降。
5、生活方式影响：不良的生活习惯，如吸烟、不健康饮食、缺乏运动等，会加速老化过程。
总之，人体老化是细胞损伤累积、遗传因素、内分泌变化、免疫系统衰退和生活方式等多重因素共同作用的结果。
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