Life and Health; A Text-Book on Physiology for High Schools, Academies and Normal Schools

Life and Health; A Text-Book on Physiology for High Schools, Academies and Normal Schools

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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. 1910 edition. Excerpt: ...the influence of the narcotic on the nervous system, but a morbid state of the larynx, trachea, and lungs results from the direct action of the smoke.--Dr. Laycock, Professor of Medicine in the University of Edinburgh. ADDITIONAL EXPERIMENTS Experiment 82. To show how the lungs may be filled with air. Take one of the lungs saved from Experiment 78. Tie a glass tube six inches long into the larynx. Attach a piece of rubber to one end of the glass tube. Now inflate the lungs several times and let them collapse. Experiment 83. To show that the expired air contains carbon dioxide. Put a glass tube into a bottle of lime water and blow through the tube. The liquid will soon become cloudy, because the carbon dioxide of the expired air unites with the lime held in solution and forms the white, solid carbonate of lime. Experiment 84. To illustrate the manner in which the?novements of inspiration cause the air to enter the lungs. Fit up an apparatus, as represented in Fig. 93, in which a stout glass tube is provided with a sound cork, B, and also an airtight piston, D, resembling that of an ordinary syringe. A short tube, A, passing through the cork, has a small India-rubber bag, C, tied to it. Fit the cork in the tube while the piston is near the top. Now, by lowering the piston, we increase the capacity of the cavity containing the bag. The pressure outside the bag is thus lowered, and air rushes into it through the tube, A, till a balance is restored. The bag is thus stretched. As soon as we push up the piston, the elasticity of the bag, being free to act, drives out the air just taken in, and the piston returns to its former place. In this experiment the elastic bag and its tube represent the lungs and trachea, and the glass vessel enclosing it...show more

Product details

  • Paperback | 94 pages
  • 189 x 246 x 5mm | 181g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236634977
  • 9781236634979