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from | Encarta |  |
Autonomic Nervous System |
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| The autonomic nervous system directs all activities of the body that occur without a person’s conscious control, such as breathing and food digestion. It has two parts: the sympathetic division, which is most active in times of stress, and the parasympathetic division, which controls maintenance activities and helps conserve the body’s energy. | ||||||
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| Appears in these articles: | ||||||
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| Heart; Nervous System | ||||||
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