What is the autonomic nervous system ?

What is the autonomic nervous system ?
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: The organs over which we have no control are controlled and controlled by the autonomic nervous system . The internal organs of the body , such as the heart , intestines , stomach , pancreas, etc., are controlled by the autonomic nervous system. Since the brain and spinal cord have no direct effect on the functioning of these systems, they perform their functions much more independently and individually.
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