Which of the following body systems has the main function of sending signals from one part of the body to other parts of the body? I. excretory system II. reproductive system III. nervous system IV. immune system A. I only B. I and II only C. III only D. I, II, and III only

C. III only

Explanation:

The nervous system controls all the functions of the body through the transmission of nerve impulses throughout the body.The nervous system is composed of:Central nervous system: brain, spinal cordPeripheral nervous system: nervesSensory nerves in various parts of the body conduct nerve impulses and transmit the signals to the central nervous system that generates a response that travels through motor neurons to the site of the stimulus.Apart from the nervous system that communicates through electrical signals, the endocrine system coordinates body functions through chemical signals.