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空气中的氧通过肺胞进入血液,靠心脏跳动再输送到人的全身。人体内需要氧气量最多的部位是脑细胞,当供氧不十分充足时,就会出现缺氧窒息症状。缺氧的症状除睑色苍白或潮红、脉搏和呼吸次数增加,呼吸困难、眩晕、头痛等外,严重时还会出现意识不清、抽筋、呼吸停止、心脏停搏等症状。脑细胞一旦中断氧气供给,就会引起不可逆变化,严重会遗留下记忆丧失、痴呆,以至变成“植物人”。
Oxygen in the air enters the bloodstream through the lungs, beating the heart and delivering it to the body. The parts of the human body that require the most oxygen are brain cells. When the oxygen supply is not sufficient, symptoms of hypoxia and asphyxia occur. In addition to the symptoms of hypoxia pale or flushing blepharops, pulse and respiratory rate increased, dyspnea, dizziness, headache and other serious cases, there will be unconsciousness, cramps, respiratory arrest, cardiac arrest and other symptoms. Once the brain cells interrupt the supply of oxygen, it will cause irreversible changes, leaving a serious memory loss, dementia, and even become “vegetative”.