Animal Physiology, Elementary

Animal Physiology, Elementary

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1875 edition. Excerpt: ...close the mouth, or abnormally in sneezing, when violent expiratory efforts are made to expel any irritant of the mucous membrane lining the air passages. Sniffing is effected by drawing the air up into the upper part of the nasal chambers, where the upper and middle turbinal bones and the olfactory nerves spread thereon are situated, when we wish to discriminate odours. Asphyxia.--From the preceding remarks the absolute necessity of the presence of the revivifying principle of oxygen, and the elimination of the carbonic anhydride accumulated by the waste of the tissues in work, is apparent; and should an insufficient supply of the former or a too great accumulation of the latter ensue, as when the respiratory process is checked or impaired, death ensues by oxygen starvation and carbonic acid poisoning. It thus happens that in drowning, strangling, choking, hanging, and in the other ways in which the respiratory process is arrested, the venous heart becomes gorged with black blood, the veins swell or become turgid; and though convulsive efforts are made to get rid of the venous blood, none of these is successful in the absence of oxygen to arterialise the blood in the pulmonary capillaries, and death rapidly ensues from paralysis of the venous chambers of the heart. Urine and Urinary Organs.--The three great excretory organs of the body are the lungs, kidneys, and skin. The former eliminate chiefly carbonic anhydride; the second urine, containing urea, uric acid, carbonic anhydride, animal extractive matters, &c.; the latter, sweat or perspiration, and fat and lactic acids, by means of the sudoriparous and sebaceous glands. The aqueous foods absorbed by the blood vessels of the stomach and intestines are conveyed by the nutritive...show more

Product details

  • Paperback | 38 pages
  • 189 x 246 x 2mm | 86g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236743687
  • 9781236743688