Term
Central Nervous System (CNS) |
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Definition
The division of the nervous system that is located within the skull |
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Somatic Nervous System (SNS) |
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The part of the PNS that interacts with the external environment (composed of afferent and efferent nerves) |
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Peripheral Nervous System (PNS) |
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The division that is located outside the skull and spine |
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Definition
Carry sensory signals from the skin, skeletal muscles, joints, eyes, and ears, etc. to the nervous system |
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Carry motor signals from the central nervous system to the skeletal muscles |
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Autonomic Nervous System (ANS) |
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Definition
The part of the peripheral nervous system that regulates the body's internal environment it is composed of afferent nerves that carry sensory signals from internal organs to the CNS and efferent nerves that carry motor signals from the |
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Autonomic motor nerves that project from the CNS in the lumbar (small of the back) and thoracic (chest area) regions of the spinal cord. |
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Autonomic motor nerves that project from brain sacral (lower back) region of the spinal cord |
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12 pairs of nerves that project from the brain |
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Term
Meninges (Meninx- Singular) |
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Definition
Protect the brain and spinal cord |
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(beneath the arachnoid membrane) contains many large blood vessels and cerebrospinal fluid |
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(pinus mother) the innermost meninx, which adheres to the surface of the CNS |
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Term
Cerebrospinal fluid (CSF) |
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Definition
(also protects the CNS) Fills the subarachnoid space, the central canal of the spinal cord |
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