The nervous system is very complex.
神经系统十分复杂Fe;@v#lm.v~^5Oeg|(q。
Its function is to control the body and its communications network.
起作用时控制机体及其反应体系*1,W7qa^DFpnZ.p~8]97。
This communication process includes receiving information and responses.
这一反应过程包括接受信息和做出反应y0r|f*n)C_r^NyG。
The basic function unit of the nervous system is the neuron.
神经系统的基本功能单位是神经元E[&*#IE&Clmb。
A neuron consists of 3 parts: the cell body, dendrites and the axon.
一个神经元被分成三个部分：细胞体、树突和轴突_P[BpX|i);[。
The cell body contains the nucleus.
细胞体内有原子核@sKh*7(;b&。

Dendrites are short, branch-like projections.
树突是一个较短，像树枝一样的凸起Yic7*obmK,jz25c*。
A neuron usually has several dendrites.
一个神经元通常有几个树突-HyOaSc*J&*K^uzV。
Dendrites conduct or transmit impulses toward the nerve cell body.
感觉冲动通常通过树突传导给神经细胞的细胞体g,+n,+aIHGdAJ7f。
An axon is a large single fiber.
轴突是一个单一的神经纤维H3WH^qHULaLj~I8o。
It extends from the cell body and carries impulses away from the cell to tissues or another neuron.
它从细胞体延伸出去，携带着感觉冲动传导给其他组织或神经元e1Ggc[VxWA.QZ=l^AA。
There are 2 kinds of neurons.
神经元分为两种8Crqq**89_uQFB;U;T-D。
Efferent neurons transmit impulses from the brain and spinal cord to muscles and glands.
传出神经元将感觉冲动传输给大脑、脊髓和腺体X.O_Q#vHHz。
Sensory or afferent neurons convey impulses from receptors to the brain and spinal cord.
感觉神经元，也称传入神经元将感觉冲动从受体传输给大脑和脊髓HRqzwo~Fo91o2@f]j[s。
The receptors are located in the skin and sense organs.
受体分布在皮肤和感觉器官上]yARPc!h5q#-.MR]w-j。
Beginning at the dendrite, impulses travel through a nerve, through the cell body and then through the axon.
感觉冲动从树突开始，经过神经纤维传输给经过胞体，然后传给轴突1wF3wnLQY^。
At the end of the axon, the impulse passes through a synapse to the dendrites of another nerve cell.
在轴突的末端，冲动通过突触传输给下一个神经细胞的树突JW&;%)u(=72kD。
The impulse continues to travel through that cell body and axon and then to a muscle or other organ.
冲动继续在胞体和轴突之间传导，然后到达肌肉或者其他器官PAGitTJTSvC。
Finally, the muscle or organ response to the impulse.
最后，肌肉和器官对冲动做出反应gM^1d-yGbmkC3aSK|.7n。
The nerve cell that picks up impulses or sensations is a sensory nerve.
接受冲动或感觉的神经细胞是感觉神经_,2q8CIEjdv,f!qmB6。
The nerve cell that starts movement in response to sensation is a motor nerve.
使身体对感觉做出反应的神经细胞是运动神经TME3GRu@R!ZW!j[i。
The process is very complicated.
这个过程十分复杂|DN9RKDf[i@b95J=VF。
Someone has compared it to electricity or to a telephone system, but this is oversimplification.
有人将其比作电流和电话系统，但这是对它的一种过分简化[I,kY*-t_VZMVp~Rrk3B。

译文属可可原创，仅供学习和交流使用，未经允许不得转载