The Eclectic guide to health; or, Physiology and hygiene Book PDF, ePub eBook

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Book Descriptions:
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. 1886 Excerpt: ...is then whirled away by the blood to every portion of the body. 88. The air surrounds the body, at all times, in the form of an invisible, odorless, tasteless gas. It forms a vast ocean of fluid, enveloping the earth to the depth of many miles. It is best known to the senses when it moves in a strong wind. It is the air that sways the tops of trees, supports the birds in their flight, and that bears up the clouds. The air is a mixture of several gases. The four principal parts of the air are oxygen, nitrogen, carbonic acid, and watery vapor. 8g. Oxygen forms about one fifth of pure air. It is the oxygen that unites with substances to burn them. It is the oxygen that enters the corpuscles and causes the warmth of the body. go. Nitrogen forms about four fifths of the air. Nitrogen does not unite with things to burn them, nor does it support life. Its great service to man is that it dilutes the oxygen, which would be too rich and active if the air were composed of it alone. Nitrogen is not poisonous. 91. Carbonic acid gas forms a very small part of pure air. Carbonic acid gas is produced by all kinds of combustion, by the decay of organic matter, and by the breathing of animals. It aids in supporting the growth of plants. It is not poisonous, but destroys animal life by causing suffocation.1 92. Watery vapor, which is water in the form of gas, is a very small part of the air. It is constantly evaporating from bodies of water, and from the moist earth. It is also produced by the breathing of animals. g3. The organs of respiration are the air-passages, the lungs, and certain muscles that cause the breathing. 94. The air-passages are: (1) The nasal openings, which lead back to the pharynx; (2) the larynx, a short, cartilaginous box, in which the voice is produced...

The Eclectic guide to health; or, Physiology and hygiene by Books Group

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