Outlines of Physiology, with an Appendix, Containing Heads of Lectures on Pathology and Therapeutics

Outlines of Physiology, with an Appendix, Containing Heads of Lectures on Pathology and Therapeutics

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1831 edition. Excerpt: ...to the stomach, intestines, and liver), is to sxiffer venous congestion, instead of the bowels themselves, during digestion, and thereby to allow the venous circulation through the liver to be equable and uniform, although the source whence the venous blood comes is liable to so great variation. And the very vascular and distensible structure of the spleen, the great size of the vein leading from it to the liver, and the correspondence of its diseases to those of the liver, may be stated as farther evidence in favour of this hypothesis. It is important to be aware, that the time in which the process of Digestion is completed, and probably the amount of nourishment procured by it from a given quantity of food, vary considerably in individuals in perfect health. We must not suppose, that we understand the whole change which is wrought on the food taken into the stomach, when we have stated its chemical changes, and its course, up to the time when it is finally mixed with, and assimilated to, the blood. As we found that the blood possesses truly Vital properties, so we can have no doubt that, during the process of digestion, these properties are communicated to a part of the nourishment taken, probably to that part of it which takes the form of globules. The process of Digestion is much influenced by mental Emotions and Sensations; but no part of it is influenced by any Voluntary efforts of mind, from the p 2 time that the food enters the oesophagus, until its residue, unfit for assimilation, along with the biliary matter, and some part of the other secretions of the alimentary canal, arrives at the rectum. The rectum is closed by the permanent tonic contraction of the sphincter ani, which is strictly a voluntary muscle, and the relaxation of the...show more

Product details

  • Paperback | 112 pages
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236595122
  • 9781236595126