一个人不吃饭,一般可以活10天左右,一个人不呼吸,只能存活6—15分钟。特别是大脑细胞,缺氧超过6分钟,脑细胞就会因缺氧而坏死,产生不可逆转的病变。 现代城市人所处的环境普遍缺乏氧气,许多人工作或读书看报、逛街购物时间一长就会出现胸闷、气短、记忆力减退、疲倦、头晕、头痛等症状。长此以往,就会导致多种疾病的发生。因此, A person does not eat, generally can live about 10 days, a person does not breathe, can only survive 6-15 minutes. Especially brain cells, hypoxia for more than 6 minutes, the brain cells will be necrosis due to lack of oxygen, resulting in irreversible lesions. Modern city people generally lack of oxygen in the environment, many people work or study reading newspapers, shopping for a long time there will be chest tightness, shortness of breath, memory loss, fatigue, dizziness, headache and other symptoms. In the long run, it will lead to a variety of diseases. therefore,