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4 Cards in this Set
- Front
- Back
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central nervous system
CNS |
composed of brain and spinal cord.
99% of all nerve cells located here. BRAIN controls center for entire nervous system. SPINAL CORD connects brain and PNS and enables spinal reflexes. |
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peripheral nervous system
PNS |
network of nerves that connects the brain and the spinal cord to other parts of the body.
brings info to and from spinal cord and brain. carry out commands of the CNS to execute various muscular and glandular activities. |
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somatic nervous system
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consists of sensory nerves whose function is to convey information from skin and muscles to CNS about conditions such as pain, temperature, motor nerves.
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autonomic nervous system
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regulates internal bodily environment.
divided into 2 parts: 1. sympathetic nervous system: arouses the body (fight or flight). 2. parasympathetic nervous system: calms the body (rest and digest). |
