Multiple Choice
In human anatomy, the central nervous system (CNS) is composed of 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) consists of which structures?
A
Spinal cord and spinal nerves
B
Autonomic ganglia and peripheral nerves
C
Brain and spinal cord
D
Brain and cranial nerves
Verified step by step guidance1
Step 1: Understand the definition of the Central Nervous System (CNS). The CNS is the part of the nervous system that processes information and coordinates activity throughout the body.
Step 2: Identify the main structures that make up the CNS. These are the brain and the spinal cord, which are enclosed within the skull and vertebral column respectively.
Step 3: Differentiate the CNS from the Peripheral Nervous System (PNS). The PNS includes all nerves outside the brain and spinal cord, such as cranial nerves, spinal nerves, and autonomic ganglia.
Step 4: Recognize that spinal nerves and cranial nerves are part of the PNS, not the CNS, even though they connect to the CNS.
Step 5: Conclude that the correct answer is the brain and spinal cord, as these two structures constitute the central nervous system.
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