Brain, spinal cord, nerves are part of which system?

• A. Digestive system
• B. Nervous system
• C. Circulatory system
• D. Endocrine system

Answer: (B)

Signaling and control throughout the body are managed by the nervous system, which includes the brain, spinal cord, and nerves. The brain processes information and makes decisions, the spinal cord acts as a highway for signals between the brain and the rest of the body, and the nerves carry messages to and from muscles and organs. This network enables sensing, movement, reflexes, and thought. The digestive system handles breaking down food, the circulatory system transports blood, and the endocrine system uses glands and hormones to regulate processes over time. Since brain, spinal cord, and nerves function as the body's signaling network, they belong to the nervous system.