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In human anatomy, the term central nervous system (CNS) refers to which structures?
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12. The Central Nervous System
Introduction to the Central Nervous System
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In human anatomy, the central nervous system (CNS) includes which structures?
A
Brain and cranial nerves
B
Spinal cord and peripheral nerves
C
Cranial nerves and spinal nerves
D
Brain and spinal cord
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Understand the definition of the central nervous system (CNS): It is the part of the nervous system that consists of the brain and spinal cord.
Recall that the peripheral nervous system (PNS) includes all nerves outside the CNS, such as cranial nerves and spinal nerves.
Identify that cranial nerves and spinal nerves are components of the PNS, not the CNS.
Recognize that the brain and spinal cord are the two main structures that make up the CNS.
Conclude that the correct answer is 'Brain and spinal cord' because these are the primary structures of the central nervous system.
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