Question

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

it originates in the brain and extends to the length of the trunk
a. Central nervous system
b. Peripherial nerves
c. Spinal cord
d. Parasympathetic systems

Answer 1

B. Peripheral nerves

Step-by-step explanation:

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