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The Organisation of the Human Body
205
The autonomic nervous system36 consists of a special set of peripheral nerves which innervate the heart, lungs, digestive tract and other internal organs. This system in turn is composed of two parts, (1) the sympathetic and (2) parasympathetic nerves. The autonomic system contains only motor nerves, and is distinguished from the rest of the nervous system by several features. The sympathetic system37 consists of neive - fibers whose bodies are located in the lateral portions of the gray matter of the spinal cord. The parasympathetic system 38 consists of fibers originating in the brain and emerging via the third, seventh, ninth and especially the tenth or vagus nerves, and of fibers originating in the pelvic region of the spinal cord and emerging by way of the spinal nerves in that region" 39
36. Ibid. p. 369 37. Ibid. 31. Ibid. 39. Ibid
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