The heart rate is regulated automatically by the autonomic nervous system, which consists of the
Posted by admin on Sep 15, 2008
The heart rate is regulated automatically by the autonomic nervous system, which consists of the sympathetic and parasympathetic divisions. The sympathetic division increases the heart rate through a network of nerves called the sympathetic plexus. The parasympathetic division decreases the heart rate through a single nerve, the vagus nerve.