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Two major divisions of the nervous system |
Central nervous system (CNS) Peripheral nervous system (PNS) |
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Central nervous system (CNS) |
Brain and spinal cord. |
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Peripheral nervous system (PNS) |
All nerves outside the CNS which include cranial nerves and spinal nerves. |
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PNS further divided into the… |
Somatic nervous system (SNS) Autonomic nervous system (ANS) |
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Somatic nervous system (SNS) is voluntary or involuntary? |
Voluntary. |
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Autonomic nervous system (ANS) is voluntary or involuntary? |
Involuntary. |
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Two branches of ANS |
1. Sympathetic division 2. Parasympathetic division |
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Enteric nervous system (ENS) is voluntary or involuntary? |
Involuntary. |
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