论文部分内容阅读
人体在正常生活状态下,需要不断地从外界环境摄取营养物质和氧气,经过加工处理后补充到身体内环境中去。同时,又要及时地把体内的代谢产物及二氧化碳排到体外来。人体通过这种与环境进行的物质和能量交换,来实现新陈代谢,完成各种生命活动。这种体内外环境间的物质交换是通过体内各种细胞、器官、系统的正常生理功能活动来进行的,以此维持人体内相对稳定的内环境,即保持内环境理化性质的
In the normal state of human life, you need to constantly take nutrients and oxygen from the external environment, after processing added to the body’s environment to go. At the same time, but also in a timely manner to the body’s metabolites and carbon dioxide emissions to the outside. Through this kind of material and energy exchange with the environment, the human body achieves metabolism and accomplishes various life activities. This exchange of matter between the environment inside and outside the body through various cells, organs, the normal physiological function of the system to carry out, in order to maintain the body’s relatively stable internal environment, that is, to maintain the physical and chemical properties of the environment