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有很多公职人员休息日在家里干这干那,周一去上班,因疲劳而困得难受,一定会打呵欠。上司在的时候,还要硬把呵欠憋回去。 为什么倦怠或疲劳时要打呵欠呢?其中自有医学方面的原因。呵欠是在供氧不足大脑运转迟钝时嘴自然张开的深呼吸。也就是说,是一种生理现象,它吸进氧气,吐出二氧化碳,使脑细胞的运转活跃。众所周知脑细胞需要大量吸收氧气。它的重量约为体重的1/50,但所消耗的能源却是全身能源的约1/4。
There are a lot of public servants who do this at home on a day off, go to work on Monday, feel tired because of fatigue, and will surely yawn. Boss at the time, but also hard yawn hold back. Why yawning when tired or tired? One of the reasons for its own medical. Yawning is a deep breath of natural mouth opening when the brain is running slow for lack of oxygen. In other words, it is a physiological phenomenon, it inhales oxygen, emits carbon dioxide, so that the brain cells are active. It is well known that brain cells require large amounts of oxygen. It weighs about 1/50 of the weight, but consumes about a quarter of the energy of the body’s energy.