Most blood vessels are innervated by the sympathetic division alone.

Name: Most blood vessels are innervated by the sympathetic division alone.
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Most blood vessels are innervated by the sympathetic division of the autonomic nervous system, which regulates functions such as heart rate, blood pressure, and respiratory rate. However, there are some blood vessels that are also innervated by the parasympathetic division, which promotes rest and relaxation.

Most Blood Vessels Are Innervated by the Sympathetic Division Alone