Which of the following is composed of the brain, brain stem, and spinal cord?

The central nervous system is composed of the brain, brain stem, and spinal cord. It serves as the main control center for processing information and coordinating responses throughout the body.

The brain is responsible for cognitive functions, emotional regulation, and sensory processing. The brain stem connects the brain to the spinal cord and regulates essential functions such as breathing and heart rate. The spinal cord acts as a communication pathway, transmitting signals between the brain and the rest of the body, and it also handles reflex actions independently of the brain.

In contrast, the peripheral nervous system includes all the nerves outside the central nervous system, expanding the ability to transmit signals to and from the limbs and organs. The digestive system focuses on food intake, digestion, and nutrient absorption, while the skeletal system provides structural support and protection for the body's organs, with no direct involvement in the processing of information or coordination as the central nervous system does.