论文部分内容阅读
乘坐飞机时,由于飞机的加速度,颠簸振动,对人体内脏有牵拉作用,会影响胃肠道的正常蠕动,甚至导致呕吐发生。人体内脏的活动,受大脑皮层的控制,紧张兴奋的情绪,会抑制唾液、胃肠液、胆汁等消化液的分泌,亦会造成消化不良。低压、缺氧这种现象,在高度1800～2000米时就会出现,并对消化道的影响较大。我们知道,空气的密度是随着高度而降低的,氧的含量和大气压力也随之下降。比如目前各种飞机的飞行高度大都在9000米左右,这种高度氧气的浓度只有原来地面的25%,溶解于人体
By plane, due to the acceleration of the aircraft, bumpy vibration, pulling on the human internal organs will affect the normal gastrointestinal motility, and even lead to vomiting. Human visceral activity, under the control of the cerebral cortex, nervous excitement, will inhibit saliva, gastrointestinal fluids, bile and other digestive secretions, will cause indigestion. Low pressure, hypoxia, this phenomenon occurs at a height of 1800 to 2000 meters, and a greater impact on the digestive tract. We know that the density of air decreases with altitude, and the oxygen content and atmospheric pressure also decrease. For example, the current flight altitude of various aircraft are mostly about 9000 meters, the concentration of this high level of oxygen only 25% of the original ground, dissolved in the human body