The care of the sick at home and in the hospital : a handbook for families and for nurses / by Th. Billroth ; translated by J. Bentall Endean.

  • Billroth, Theodor, 1829-1894.
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: The care of the sick at home and in the hospital : a handbook for families and for nurses / by Th. Billroth ; translated by J. Bentall Endean. Source: Wellcome Collection.

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    same time impel the blood into the lungs and into the body as described. Then the auricles contract and drive the blood into the relaxed ventricles. During the contraction of the ventricles the heart heaves somewhat, so that the apex of the heart beats against'the front thoracic wall (impulse of the heart's apex). 7. When the ventricles contract, why is it that the blood does not flow back into the auricles ? Because, during the contraction of the ventricles, this prevented by the openings of the auricles being closed by valves. Should this somewhat complicated arrangement be more or less destroyed by diseases of the heart, then irregu- larities arise in the circulation of the blood, which may become of serious consequence, specially to the respiration. 8. Ho7V frequently does the heart contract I From sixty to eighty times per minute. These contractions are not only felt at the apex of the heart, but also by the blood- wave, which is transmitted from the heart into the arteries with the greatest velocity. To ascertain the velocity of the heart-beats (of the pulse), one usually feels the radial artery on the inner side of the arm, close above the wrist on the thumb side. THE TRACHEA, THE LARYNX, AND THE LUNGS. THE RESPIRATION. (the respiratory system.) I. What is understood by the Trachea and the Larynx I The Trachea (wind-pipe) is a tube issuing out of the thorax from the lungs, and, passing upwards inside in the front of the throat, terminates in the mouth close behind the tongue.