is subdivided into the somatic and autonomic nervous system.
1. The somatic nervous system carries all those nerves that control voluntary muscles of the body.
2. The autonomic nervous system controls the operation of those organs that have an activity independent of the will and are of vital importance such as to control heart rate, respiratory rate during day and night, striated muscles and glands. The autonomic system is subdivided into the sympathetic and parasympathetic system. The Sympathetic regulates the function of organs in situations of emergency and the parasympathetic system regulates the function of organs to normal activity contexts.
sympathetic and parasympathetic systems are always active but sometimes more or less active depending on the situation. During the day situations emergencies are more common, so the sympathetic system is more active. Overnight and / or day, in situations of peace and quiet, the parasympathetic system is dominant.
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