Which system coordinates body activities through signaling?

The nervous system is responsible for coordinating body activities through signaling. It achieves this by transmitting electrical impulses between neurons, which allows for rapid communication between different parts of the body. This system enables the body to respond to internal and external stimuli effectively.

The nervous system comprises the brain, spinal cord, and peripheral nerves, all of which work together to process information and orchestrate responses, such as movement, reflexes, and coordination of complex actions. For instance, when you touch a hot surface, sensory receptors send signals through the nervous system to the brain, which then coordinates an immediate response to withdraw your hand.

In contrast, while the digestive system focuses on breaking down food and absorbing nutrients, the circulatory system is responsible for transporting blood and nutrients throughout the body. The skeletal system provides structural support and protection for the body's organs but does not play a direct role in signaling or coordination of activities.