To discuss:
Autonomic control of certain organs by dual innervation, and examples of antagonistic and cooperative effects on an organ
Introduction:
The autonomic nervous system comprises of sympathetic and parasympathetic divisions. Both these system innervate the visceral organs and have their own effects on the target organs. The sympathetic system operates in heart, lungs, and smooth muscles and it executes its effect on flight or fight response to make organs, excited. In a contrary, parasympathetic system innervates the same organ and its effects execute on rest or digest mode. The innervation of an organ by sympathetic and parasympathetic system is said to be dual innervation. Its cooperative and antagonistic effect is explained herein.
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