Motor nerves of the peripheral nervous system

These nerves take messages from the CNS to various parts of the body such as skeletal muscle, smooth muscle, cardiac muscle, and glands. The messages can be considered as electrical pulses . However, the analogy with electricity should not be taken too far since the pulse is a result of ion flow across the membranes of nerves and not a flow of electrons (Appendix 2). 

It should be evident that the workings of the human body depend crucially on an 

The motor nerves of the peripheral nervous system have been divided into two subsystems (Fig. 11.2)  

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