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The Nervous
System
The nervous system is the basic communication and
control system in the body. It monitors the animal's internal and
external environments and directs activities to maintain the
well-being of the body (homeostasis).
General Terminology
 | neur/neuro- = nerve |
| myel/myelo- = spinal cord |
| enceph/encephalo- = brain |
| cephal/cephalo- = head |
Basic anatomy and physiology
The basic functional unit of the nervous system is
the neuron
- a cell specialized for irritability and conductivity.
Basic divisions
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