Which human body system includes the brain, spinal cord, and nerves?
A
Circulatory system
B
Nervous system
C
Digestive system
D
Respiratory system
Correct Answer: Option B — Nervous system
Explanation:
The nervous system coordinates body functions by transmitting electrical and chemical signals between the brain, spinal cord, and peripheral nerves. It controls voluntary movements, involuntary functions, sensory perception, and rapid response to stimuli.