What is the spinal cord composed of and where is it?
A) It is a myelin sheath in the backbone.
B) It is a bundle of nerve fibers in the lower skull.
C) It is the bundles of nerve fibers that connect the brain to muscles and organs.
D) It is a bundle of nerve fibers in the backbone.
E) It is a bundle of interneurons in the backbone.
Correct Answer:
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