The laws and mechanics of circulation, with the principle involved in animal movement . nce the effect of the former is to pump theportal blood and lymph into the systemic current and producefullness in the vessels, which favors the nutritive processes andthe formation of fat. It was a sharp, true saying. The effectof the rapid pumping action in the abdomen in reducing thevolume of the portal blood has forcible illustration in the 226 PHYSIOLOGICAL ANATOMY vocalist, who complains of • a feeling of emptiness in thestomach, and rushes to the restaurant to till himself fullagain, eating ravenousl
The laws and mechanics of circulation, with the principle involved in animal movement . nce the effect of the former is to pump theportal blood and lymph into the systemic current and producefullness in the vessels, which favors the nutritive processes andthe formation of fat. It was a sharp, true saying. The effectof the rapid pumping action in the abdomen in reducing thevolume of the portal blood has forcible illustration in the 226 PHYSIOLOGICAL ANATOMY vocalist, who complains of • a feeling of emptiness in thestomach, and rushes to the restaurant to till himself fullagain, eating ravenously to appease the appetite. The deepand long inspiratory efforts, followed by the long forced expi-rations, had literally emptied the portal circulation, as it were,also the viscera of the force-producing elements. In fine, forincreasing the portal circulation it calls for rhythmical com-pression of the liver and portal vessels synchronous with respi-ration. The following beautiful cuts (Figs. 84, 85) show the mode oftermination of the portal vessels in the inter-lobular veins, and. Fig. 84.—Rabbits Liver Injected, showing a portal branch, the vence inter-lobitlares, thecapillary network, and a vena intra-lobularis in the centre of a lobule.—Frey. these again in the intra-lobular (Fig. 85, 3, 2, 1), or radicals ofthe open hepatic veins ; so that one. can readily understandwhy rhythmical compression of the liver should increase cir-culation in the venous channels, while fhe speed of the cur-rent thus produced would depend upon the energy in therespiratory rhythms. Of course, the action in the portalvessels should be considered as in connection with this,while the increase of pressure in the parenchymatous tissuepromotes absorption, but increase in arterial pressure exertsno influence upon it (? enersich) ;* hence, rhythmical com- * Ludwigs Arbeiten, 1871, p. 53. PH SIOLOGICAL A1STAT0MY. 227 pression of the liver during respiration is essential for expedit-ing absorption in
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
