相信大家都会有这样的感觉,在吃饱饭后,没过多久就会感到困倦,恨不得立刻躺到床上睡一觉。记得小时候曾在《十万个为什么》里面看到:“吃饭后为了有利消化,消化系统的血流量会增加,相对的,大脑的血流量就会减少,所以人就会觉得想睡觉。”其实,这个说法并不正确,大脑作为全身最重要的器官,它的血液供应要优先保证,为了消化而减少大脑的血流量并不合理。另外,也没有任何证据表明饭后大 I believe we will have this feeling, after eating, it will not be long before we feel sleepy, anxious to lie down immediately to sleep in bed. I remember when I was in “One Hundred and Thousand Why”: “After digestion, blood flow to the digestive system will increase in order to benefit digestion. In contrast, blood flow to the brain will decrease, so people will feel like going to bed.” Actually, this statement is not correct. As the most important organ of the whole body, the brain’s blood supply is given priority. It is not reasonable to reduce brain blood flow for digestion. In addition, there is no evidence of big meal