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人体与环境之间、体内不同部位之间的热传递,都受生理过程调节,其中循环系统的调节又居重要地位。飞机座舱的狭小空间,个人飞行防护装备的不透气特性等,使航空温度负荷具有高温高湿的特点。因而研究高温环境中人体的心脏泵血功能,血管舒、缩反应,血液总量和成分的变化等,对改进航空温度防护均有实际意义。血液总量的变化正常成人血液总量占体重7—8％。体重
Between the human body and the environment, the heat transfer between different parts of the body, are subject to physiological processes, of which the regulation of the circulatory system and an important position. The small space of the cockpit, the airtightness of the personal flight defense equipment and the like make the aviation temperature load have the characteristics of high temperature and high humidity. Therefore, studying the heart pumping function, vasomotor and contractions, changes in blood volume and composition in high temperature environment have practical significance for improving aeronautical temperature protection. Changes in total blood normal adult blood accounted for 7-8% of total body weight. body weight