File:Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation (1919) (14742139406).jpg

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Identifier: physiologyhygien00heiz (find matches)
Title: Physiology, hygiene and sanitation, an elementary textbook of physiology, with special attention given to hygiene and sanitation
Year: 1919 (1910s)
Authors: Heizer, W. L. (W. Lucien), b. 1880
Subjects: Physiology Hygiene Sanitation
Publisher: Louisville, Ky., C.T. Dearing Printing Co., Incorporated
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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d. If one end of the tube is plug-ged, all the water will be forced out of the other end.So it is evident that some arrangement has been madeto keep the blood moving onward on its course when themuscles contract. This is done by means of valves placedbetween the auricles and the ventricles. These valves are thin mem-branes so arrang-ed that no resist-ance is made tothe flow of bloodfrom the auriclesinto the ventricles,but when theheart pumps,these valves atonce close tightand no blood ispermitted tosquirt backwards.Some diseases like rheu matismoften cause thesevalves to leak andsome blood is permitted to escape back into the auricles,and a curious sound is made by the blood passing be-tween them. This is called a leaky heart. The Work of the Heart. The heart beats in an adultabout seventy-two times every minute. In health itswork is regular and time is given between each beat forthe heart to rest. It is the hardest-worked organ in thebodv and its work everv day is as much as would be
Text Appearing After Image:
Pig-. 58.—Arteries of side of the face andhead, showing- how arteries divide intosmaller branches. THE CIRCULATORY SYSTEM 141 done, if a man carried two hundred pounds to the topof a mountain two thousand feet high. When the musclesof the body are active, as in exercise, the hearts actionis more rapid and greater effort is made each beat to %S3W? f^eV*^

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https://www.flickr.com/photos/internetarchivebookimages/14742139406/

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InfoField
  • bookid:physiologyhygien00heiz
  • bookyear:1919
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Heizer__W__L___W__Lucien___b__1880
  • booksubject:Physiology
  • booksubject:Hygiene
  • booksubject:Sanitation
  • bookpublisher:Louisville__Ky___C_T__Dearing_Printing_Co___Incorporated
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:141
  • bookcollection:library_of_congress
  • bookcollection:americana
Flickr posted date
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28 July 2014

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