The brain is a part of which organ system?
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Circulatory System
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Respiratory System
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Nervous System
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Excretory System
C
Correct answer
Explanation
The brain is the central processing organ of the nervous system, receiving sensory input, coordinating responses, and enabling cognition. The circulatory system moves blood, respiratory handles gas exchange, and excretory removes waste. The brain contains neurons and glial cells that transmit electrical signals.