File:Anatomy, physiology and hygiene (1890) (14577748060).jpg

Identifier: anatomyphysiolog00mayc (find matches)
Title: Anatomy, physiology and hygiene
Year: 1890 (1890s)
Authors: May, Charles Henry, 1861-1943
Subjects: Human anatomy Physiology Hygiene, Popular. (from old catalog)
Publisher: New York, W. Wood and company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
Fig. 68.—The Heart and Lungs. On each side the lungs are seen ; in the centre is theheart; above are the windpipe, and the laige blood-vessels passing to and from the heart. spaces containing air. After entering the lungs each bron-chus divides again and again (Fig. 69), each branch, knownas a bronchial tube, becoming smaller, until finally thebranches of each bronchial tube have become so small thatthey can no longer be seen without the microscope (Fig.70, a). THE ORGANS OF VOICE AND BREATHING. 137
Text Appearing After Image:
Fig. 69.—The Larynx, Trachea, Right and Left Bronchus, and the Lungs. The latter havebeen cut open to show the method of division and subdivision of the bronchus. 282. The Air-Vesic I e s.—The smallest branch of a bronchus (Fig.70, a) swells so as to end in a littlebag containing air, called an air-space (Fig. 70, b). The walls ofthese air-spaces are again subdividedso as to form a large number of smallsacs called air-vesicles. The wallsof these air-vesicles are very thin andcontain many blood-vessels. Fromthis description it will be seen thatthe lungs really consist of a greatcollection of small sacs or spaces filledwith air.

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