A Complete Collection of 100000 Whys
Fav十万个为什么
为什么人体有免疫细胞？
1、免疫细胞是人体对抗病原体的第一道防线，它们能够识别并清除入侵的细菌、病毒和其他有害物质，保护身体免受感染。
2、免疫细胞通过产生抗体和细胞因子等物质，能够特异性地识别和攻击体内的异常细胞，如癌细胞，从而维持身体的健康。
3、免疫细胞在人体受伤或感染时，能够迅速聚集到受损部位，进行修复和炎症反应，加速伤口愈合和病原体清除。
4、免疫细胞具有记忆功能，能够在初次感染后记住病原体，使得再次遇到相同病原体时能够更快、更有效地进行防御，这就是疫苗接种的原理。
5、免疫细胞在调节人体免疫系统方面发挥着重要作用，它们能够平衡免疫反应，避免过度反应导致自身免疫疾病。
总之，免疫细胞是人体免疫系统的重要组成部分，它们通过识别、攻击和清除病原体、异常细胞，以及调节免疫反应，保护人体健康。
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