English:
Identifier: handbookofphysio00bake (find matches)
Title: Hand-book of physiology
Year: 1892 (1890s)
Authors: Baker, W. Morrant, (William Morrant), 1839-1896 Harris, Vincent Dormer Kirkes, William Senhouse, 1823-1864. Hand-book of physiology. 13th ed
Subjects: Physiology Human physiology
Publisher: London : John Murray
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School
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he straight ones becoming slightly curved, and those alreadycurved becoming more so ; but they recover their previous formas well as their diameter when the ventricular contraction ceases,and their elastic walls recoil. The increase of their curves whichaccompanies the distension of arteries, and the succeeding recoil,may be well seen in the prominent temporal artery of an oldperson. In feeling the pulse, the finger cannot distinguish thesensation produced by the dilatation from that produced by theelongation and curving ; that which it perceives most plainly,however, is the dilatation, or return, more or less, to the cylin-drical form, of the artery which has been partially flattened bythe finger. The pulse—due to any given beat of the heart—is not per- 218 CIRCULATION OF THE BLOOD. (CH. VI. ceptible at the same moment in all the arteries of the body.Thus, it can be felt in the carotid a very short time before it isperceptible in the radial artery, and in this vessel again before
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Fig 179.—Mareys Sphygmograph, modified by Mahomed. it occurs in the dorsal artery of the foot. The delay in thebeat is in proportion to the distance of the artery from theheart, but the difference in time between the beat of any twoarteries probably never exceeds i to -§- of a second. A distinction must be carefully made between the passage ofthe wave along the arteries and the arterial flow itself. Both
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