Contributions to the Physiology and Pathology of the Circulation of the Blood

Contributions to the Physiology and Pathology of the Circulation of the Blood

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1857 edition. Excerpt: ...and consequently, like all other freely moving currents, then begin to exercise a power of lateral draught, and thus induce that preponderance of the external pressure which causes the act of absorption. But it is impossible to advance a step further in the study of the physiology or pathology of the circulation until the term " capillaries" is clearly defined, and some attempt is made to confine within reasonable bounds their healthy powers and uses. In an anatomical point of view, many eminent men seem to think that the term " capillaries " should be restricted to those cylindrical intermediate tubes vessels take no part whatever in the causation of either process; the active power, which induces both effusion and absorption, being, in the healthy state, wholly derived from the columns of blood contained within those vessels. In concluding this brief recapitulation of the views contained in my former paper, it only remains for me to add, that as the relative facilities afforded for the passage of the blood through the minute vessels of different organs and structures must necessarily vary with the anatomical arrangement of those vessels, so will the activity, and even the nature, of these functions which are connected with the amount of lateral pressure of the blood-currents be in the same proportion affected. In a secreting structure, where effusion is continually occurring, the internal pressure will preponderate in the intermediate vessels as completely as in the minute diverging ones: while in a vascular arrangement, like that of the lung, it appears to me very certain that the cylindrical vessels possess an absorbing power not inferior to that of the adjacent veins. It is also, from the same reasoning, evident that a...show more

Product details

  • Paperback | 58 pages
  • 189 x 246 x 3mm | 122g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236499913
  • 9781236499912