A treatise on physiology and hygiene for educational institutions and general readers .. . o Cfl W o O .o >. THE CIRCULATION. 141 27. Activity of the Heart.—The average number of heart-beatsduring a lifetime may be considered as at the rate of seventy-twoper minute, although this estimate is somewhat low, for during sev-eral years of early life the rate is above one hundred a one hour, then, the heart pulsates four thousand times; in aday, one hundred thousand times ; and in a year, nearly thirty-eightmillion times. If we compute the number during a lifetime—fortyyears being the p
A treatise on physiology and hygiene for educational institutions and general readers .. . o Cfl W o O .o >. THE CIRCULATION. 141 27. Activity of the Heart.—The average number of heart-beatsduring a lifetime may be considered as at the rate of seventy-twoper minute, although this estimate is somewhat low, for during sev-eral years of early life the rate is above one hundred a one hour, then, the heart pulsates four thousand times; in aday, one hundred thousand times ; and in a year, nearly thirty-eightmillion times. If we compute the number during a lifetime—fortyyears being the present average longevity of civilized mankind—weobtain as the vast aggregate, fifteen hundred millions of pulsations.{Read Note 8.) sons, fainting becomes a kind of habit; they fall into a fainting fit on veryslight agitation. In them the appearances are much worse than the reality,especially to those who are not familiar with the ailment. But persons whofaint after exhaustion, fatigue, fasting, or anguish, require prompt ordinary signs are great pallor, loss of sensation, and trembling
Size: 1874px × 1334px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1, booksubjectphysiology, bookyear1884
