Human physiology : designed for colleges and the higher classes in schools and for general reading . in the other direction,to the front; and therefore the heartis thrown a little forward, as represent-ed by the dotted lines. The changeof position thus produced is indeedbut slight, but it is sufficient to causethe impulse. The entrance of theblood into the pulmonary artery per-haps aids in the result, but not verymaterially. _ 128. The heart, as I have alreadyhinted, is inclosed in a sac, called thepericardium, which, at its upper part, is fastened all around the vessels that proceed from the
Human physiology : designed for colleges and the higher classes in schools and for general reading . in the other direction,to the front; and therefore the heartis thrown a little forward, as represent-ed by the dotted lines. The changeof position thus produced is indeedbut slight, but it is sufficient to causethe impulse. The entrance of theblood into the pulmonary artery per-haps aids in the result, but not verymaterially. _ 128. The heart, as I have alreadyhinted, is inclosed in a sac, called thepericardium, which, at its upper part, is fastened all around the vessels that proceed from the sac is lined on the inside by a serous membrane, which alsolines the outside of the heart, being reflected over upon it fromthe pericardium. This membrane forms, therefore, a sac withoutany outlet. This is made plain by Fig. 35. In this diagram,showing the plan of the serous membrane of the pericardiuma, a are the auricles; v, v, the ventricles; b, c, the vessels pro-ceeding from the heart; p the serous membrane lining the out-side of the heart; p, the same membrane reflected from the. FIG. 35.
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Keywords: ., bookauthorhookerwo, bookcentury1800, bookdecade1850, bookyear1854
