Archive for February 16th, 2009
The heart rate is regulated automatically by the autonomic nervous system, which consists of the
Monday, February 16th, 2009The 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.