Together, the brain and spinal cord form which body system?

• A. Digestive system
• B. Endocrine system
• C. Central nervous system
• D. Respiratory system

Answer: (C)

The brain and spinal cord form the central nervous system, the body's main processing and control center. It integrates sensory information from the body, processes it, and sends out coordinated motor commands to muscles and glands, supporting both quick reflexes and higher functions like thinking and memory. The other options describe different systems: the digestive system handles food processing, the endocrine system uses hormones to regulate body functions, and the respiratory system manages breathing. So, together the brain and spinal cord are the central nervous system.