Colorado Esthetician Written Practice Exam

Which system controls and coordinates all other systems of the body and makes them work harmoniously and efficiently?

1. Circulatory

2. Digestive

3. Nervous

4. Respiratory

The correct answer is: Circulatory

The correct answer is the nervous system. The nervous system is responsible for controlling and coordinating all other systems of the body, ensuring they work together harmoniously and efficiently. This system includes the brain, spinal cord, and a network of nerves that transmit signals between different parts of the body. The circulatory, digestive, and respiratory systems play important roles in the body but do not have the overall control and coordination function that the nervous system does.