It's not that all these layers are wrapped around the nervous system and the endocrine system.
不是所有功能,都围绕着神经系统和内分泌系统展开的
How do your kidneys know what the status is of inside your blood, They know that because they receive signals from the endocrine system and the nervous system.
肾脏何以得知血液组分的状态,它们能够知道这些是因为它们接收到,来自内分泌系统和神经系统的信号
The nervous system, the endocrine system which we'll start talking about a little bit today is the system that's responsible for sending signals back and forth between tissues of your body.
还有神经系统,和我们今天将要提到的内分泌系统,内分泌系统主要负责,在体内各组织之间传递信号
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