Human physiology : designed for colleges and the higher classes in schools and for general reading . FIG. PLAN OF THE PERICARDIUM. CIKCULATION. 85 Action of the heart involuntary. Number of its beats. upper part of the heart on to the inside of the arrangement of this membrane, as it fits on to the heart,is much like the common double nightcap, as it fits on tothe head; and if it were dissected off whole from the outsideof the heart and the inside of the pericardium, it would belike such a nightcap when taken off from the head—that is, asac without an outlet. Now, this sac
Human physiology : designed for colleges and the higher classes in schools and for general reading . FIG. PLAN OF THE PERICARDIUM. CIKCULATION. 85 Action of the heart involuntary. Number of its beats. upper part of the heart on to the inside of the arrangement of this membrane, as it fits on to the heart,is much like the common double nightcap, as it fits on tothe head; and if it were dissected off whole from the outsideof the heart and the inside of the pericardium, it would belike such a nightcap when taken off from the head—that is, asac without an outlet. Now, this sac is kept moistened by afluid exuding from its whole surface, so that, as that part of itwhich lines the outside of the heart, in the motions of thatorgan, rubs against that part which lines the pericardium, thelubrication prevents any injury from the friction. This lubri-cating fluid is continually renewed, the exhalents and the absorb-ents balancing each other in their action. When the exhalentssecrete more fluid than the absorbents can take up, it accumu-lates, making what is called dropsy of the hear
Size: 1657px × 1507px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhookerwo, bookcentury1800, bookdecade1850, bookyear1854
