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巴甫洛夫早在其初期科学工作中就已实验证明了神经系统在动物机体的所有生命活动中的特殊重要作用,特别是神经系统在机体与周围环境的相互作用上和调节新陈代谢与消化过程上的特殊重要作用。那时巴甫洛夫已指出:动物机体与周围环境的联系是通过各种化学物质(这些物质必须不断地输入体内,成为该机体的组成部分),(?)就是通过食物而实现的。所以,那时已把中枢神经系统所调节的营养和消化看成是保证动物机体与周围环境联系的主要过程。
Pavlov, as early as in his early scientific work, has experimentally proved the special important role of the nervous system in all life activities of the animal body, in particular the interaction of the nervous system with the surrounding environment and the regulation of the metabolism and digestion process On the special important role. Pavlov, at that time, had pointed out that the connection between the animal body and its surroundings was through the use of various chemicals, which must be continuously introduced into the body and form part of the body, through food. So, at that time, the nutrition and digestion regulated by the central nervous system have been regarded as the main process to ensure that the animal body is in contact with the surrounding environment.