The laws and mechanics of circulation, with the principle involved in animal movement . an. The cava (B), oesophagus (C), and aorta, with the accom-panying duct (D), occupy the mid-region upon a line extend-ding from the sternum to the spine, with the cava a little to theright (left in the picture). And everything being ready, thestump of the cava was then snipped with a sharp pair ofscissors. The blood spurted with great force out of the vessel,, 222 THE FOECE TO THE PORTAL CIRCULATION. leaping ten feet, and as though shot out of a syringe, underthe force in the abdomen ; but was not sustaine
The laws and mechanics of circulation, with the principle involved in animal movement . an. The cava (B), oesophagus (C), and aorta, with the accom-panying duct (D), occupy the mid-region upon a line extend-ding from the sternum to the spine, with the cava a little to theright (left in the picture). And everything being ready, thestump of the cava was then snipped with a sharp pair ofscissors. The blood spurted with great force out of the vessel,, 222 THE FOECE TO THE PORTAL CIRCULATION. leaping ten feet, and as though shot out of a syringe, underthe force in the abdomen ; but was not sustained, falling downimmediately upon the diaphragm in a running stream. I thenplaced my open hand upon the convexity of the diaphragm,pushing it downward in imitation of inspiration, when the jetwas renewed instantaneously, rising and falling with theincrease and diminution of the pressure ; hence, there could beno doubt on earth that inspiration rushes the venous blood inthe abdomen toward the lungs. Of course, a great deal of theblood had come from the lower cava system, rushing out of. Fig. 83.—Transverse Section of the Trunk through the Inferior Margin of the Chestaround the Circle of the Diaphragm, showing the form of the abdomen, which isegg-shaped, the large end of the ovoid presenting in the chest-excavation, the smallin the pelvic basin, which forms the posterior end of the cavity. A, diaphragm ; 2?,stump of lower cava, ligatured ; C, oesophagus, ligatured ; D, thoracic aorta andthoracic duct, ligatured ; E, first lumbar vertebra ; F, lumbar muscles (quadratuslumborum, etc.). both under the action of the elastic air-cushion, while the forcetransmitted from the containing walls, in imitation of theaction in inspiration, increases it. In the first instance, theintra-abdominal pressure of itself was sufficient for producingthe jet, showing it to be considerable. It should be mentionedhere that the valves in the femoral veins obviate reflux in thelower extremities, so that th
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Keywords: ., bookcentury1800, bookde, booksubjectblood, booksubjectrespiration
