File:"Anatomy, physiology and laws of health;" (1885) (14594987398).jpg

Identifier: anatomyphysiolog00jord (find matches)
Title: "Anatomy, physiology and laws of health;"
Year: 1885 (1880s)
Authors: Jordan, Johnson H. (from old catalog)
Subjects: Medicine, Popular Anatomy Physiology
Publisher: Chicago, W. H. Moore & co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ernum orbreast-bone, and divides the chest into two cavities. THE LAWS OF HEALTH. 31 The shape of the lungs, as a whole, corresponds with the cavity ofthe chest, being rounded or convex next the ribs, and hollow or con-cave next the heart and diaphragm. In color they are of a grayishTed, but in old age change to a livid purple. The great serous mem-brane, already described, which lines the inside of the chest, calledthe pleura is reflected upon the lungs, and forms their external cover-ing or coat. That is to say, the pleura is double, one lamina of itlining the inside of the ribs, or costals, called the pleura costalis ; andthe other—a continuation of the same—which covers the lungs,called the pleura pulmonalis. The right lung is the larger (becausethe heart takes up a portion of the left side of the chest), and isdivided into three portions, called lobes. The left lung has but twolobes—the heart and its surrounding membrane, the pericardium,being situated between them. Fig. 8.
Text Appearing After Image:
1,1. An outline of theright lung. 2. 2. An outline of the left lung. 3. The larynx. 4. The trachea, or wind- pipe. 5. 6. The right and left bronchial tubs,which go to theright and leftlungs, and di-vide into innu-merable branch-es, which termi-nate in the littleair-cells, 9, 9, 9,9, a very imper.fect idea ofwhich is shownin the Figure. Fig. 8—The Trachea and Air-Tubes of the Lungs.The Trachea, or wind-pipe, passes down in front of the throat oifood-pipe, and may be distinctly felt, being immediately beneath theskin. Just below the top of the breast-bone it divides laterally intotwo branches, called the bronchia, which go direct to the lungs, andthere divide and subdivide into an immense number of little tubes,constituting the air-passages of the lungs, which gradually diminish 32 ANATOMY, PHYSIOLOGY AND in size, and finally terminate in what are called the air-cdls. Thesecells are small, very thin, and communicate freely with each other.The membrane which composes these cells is con

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