File:An academic physiology and hygiene (1903) (14780801402).jpg

Identifier: academicphysio00bran (find matches)
Title: An academic physiology and hygiene ..
Year: 1903 (1900s)
Authors: Brands, Orestes M. (from old catalog) Van Gieson, Henry C., (from old catalog) joint author
Subjects: Hygiene Physiology
Publisher: Boston, B. H. Sanborn & co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ch, though notexactly food or drink, is as important as either. Asthe carbonic acid and water are passing from the bloodthrough the lungs into the outer air, oxygen is passingfrom the air through the lungs into the blood and is car-ried by it to all parts of the body. 3. Respiration is therefore a process by which theoxygen of the air is introduced into the blood, and by EXPLANATION. a, the left lung. b> the right lung. c, the windpipe. dy the heart. <?, the great artery carry-ing blood to the lungs. /, the great vein. g, the great artery carry-ing blood to the body. which part of the useless and injurious materials are ex-pelled in gaseous form. The drawing in of the air iscalled inspiration; the forcing out of the air, which hasbecome changed during its stay in the lungs, is called ex-piration— the two functions are together known as respi-ration, or breathing. 4. The Organs of Respiration. — The respiratory organs arethose that are essential to breathing. They are located
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RESPIRATION. ICX) in the neck and cavity of the chest, and consist of thelarynx, trachea, bronchial tubes> and lungs, The p; of the nose and mouth may be regarded as the outeropenings of the respirator)- apparatus ; and the musclesof the ribs and the muscular diaphragmy which forms the floor of the chest, as furnishing the motive power. 5. Through the action of these organs atmospheric airi> carried into the lungs where the oxygen it containspasses through a thin mem-brane and mixes with theimpure blood carried to thelungs from the right side ofthe heart. As the oxygenenters the blootl, carbonicacid and watery vapor, whichare products of the waste ordecomposition going on inthe tissues, are cast out andexpelled from the lungs.The following is a brief de-scription of the organs ofbreathing and of the func-tions of each : — 6. The larynx (Gr., awhistle), sometimes calledthe voice box, because itcontains the cords ormembranes by means ofwhich the voice is prduced, is the enlarged

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