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ahrayia [7]
3 years ago
7

What is composed of masses of nerve cells, with fibers, running upward and downward;

Biology
1 answer:
sukhopar [10]3 years ago
5 0

Answer:

B. Peripheral nerves

Explanation:

Peripheral nerves use bundles of nerve fibers (axons) to send information around the central nervous system.

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Allushta [10]

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