Message are transmitted from your spinal cord to your heart muscles by the:
Correct answer: C. autonomic nervous system
- A. limbic system
- B. parasympathetic nervous system.
- C. autonomic nervous system
- D. central nervous system
Explanation
The autonomic nervous system carries involuntary messages to organs such as the heart; its sympathetic and parasympathetic branches regulate cardiac activity. The central nervous system sends commands but does not describe the pathway to the heart muscle here.
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