autonomic nervous system


autonomic nervous system

noun

Definition of AUTONOMIC NERVOUS SYSTEM

: a part of the vertebrate nervous system that innervates smooth and cardiac muscle and glandular tissues and governs involuntary actions (as secretion, vasoconstriction, or peristalsis) and that consists of the sympathetic nervous system and the parasympathetic nervous system—called also vegetative nervous system; compare central nervous system, peripheral nervous system

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