众所周知,氧是机体进行正常代谢活动所不可缺少的物质.机体首先通过呼吸系统把外界环境中的氧吸入体内,以物理溶解及与血红蛋白化学结合的方式进入血液,然后由血液循环将其输送到各组织器官.由于脑的血液循环具有自动调节的能力,因此当颅内压和血压在生理范围内波动时,均不会影响脑的血流量,也就是说,在这种自动调节的控制下,脑的血液循环一直保持着稳定, As we all know, oxygen is the body’s normal metabolic activity of the indispensable material.First, the body through the respiratory system to the environment in the oxygen inhalation of the body to physically dissolve and hemoglobin combined with the way into the blood, and then transported by the blood circulation to Each tissue and organ.Because the cerebral blood circulation has the ability of automatic regulation, so when the intracranial pressure and blood pressure fluctuations in the physiological range, will not affect the brain blood flow, that is to say, under the control of this automatic adjustment , The brain’s blood circulation has remained stable,