The nervous system is a system for supporting the body's structure.
a system for circulating blood throughout the
body.
a network that carries messages between the
brain and the rest of the body.
a network of glands that secrete hormones.
DONE

The answer is a network that carries messages between the

brain and the rest of the body.

Explanation:

since nervous systems sends the messages through neurons.

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answer; (b) i believe its metabolic rate of the patient; plz check first