The Autonomic Nervous System
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This nervous system controls the nerves of the inner organs of the body on which humans have no conscious control. This includes the heartbeat, digestion, breathing (except conscious breathing) etc.
The nerves of the autonomic nervous system enervate the smooth involuntary muscles of the internal organs and glands and cause them to function and secrete their enzymes
The nerves of the autonomic nervous system enervate the smooth involuntary muscles of the internal organs and glands and cause them to function and secrete their enzymes