Answer! will give brainliest. the diagram below shows the two main parts of the human nervous system. what are the names of the parts of the nervous system labeled a and b? describe the main functions of each part in your answer.

A-   brain + cranial nerves (I'm assuming since they are related)

B-    Radial nerve

Explanation:

The cranial nerves are pairs of nerves that connect your brain to different parts of your head, neck, and trunk. There are 12 of them, each named for their function or structure. Their uses are mainly categorized as Sensory and Motor. Sensory nerves are involved with your senses, such as smell, hearing, and touch. Motor nerves control the movement and function of muscles or glands.

The radial nerve controls movement of the triceps muscle, which is located at the back of the upper arm and is responsible for extending the wrist and fingers. It also controls sensation in part of the hand.

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explanation:

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