. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. ANIMAL PHYSIOLOGY. bustion be known, then by the law of the conversion and equiv- alence of energy the mechanical equivalent can be estimated in that particular case. The heat-producing power of different substances can be directly learned by ascertaining the extent to which, when ful
. A text-book of animal physiology [microform] : with introductory chapters on general biology and a full treatment of reproduction, for students of human and comparative (veterinary) medicine and of general biology. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. ANIMAL PHYSIOLOGY. bustion be known, then by the law of the conversion and equiv- alence of energy the mechanical equivalent can be estimated in that particular case. The heat-producing power of different substances can be directly learned by ascertaining the extent to which, when fully burned (to water and carbonic anhydride), they elevate the temperature of a given volume of water; and this can at once be translated into its mechanical equivalent of work, so that we may say that one gramme of dry proteid would give rise to a certain number of gramme-degrees of heat or kilogramme- metres of work. A few figures will now show the relative values of certain food-stuffs: ' 1 gramme proteid 1 gramme urea. Available energy of the proteid 5,108 785 4368 Kilomet. 3,161 811 1,850 The reason of the subtraction has been explained above. Taking another diet in regard to which the estimates differ somewhat from those given previously, but convenient now as showing how equal weights of substances produce very dif- ferent amounts of energy, we find thatâ. KilMnet. 100 grammes proteid yield 100 grammes fat , 240 grammes starch yield. ToUl 185,000 884,100 307,080 966,780 In other words, nearly a million kilogramme-metres of en- ergy are available from the above diet for one day, provided it be all oxidized in the body. (Food^stuffs, then, with the oxygen of the air, are the body's sources of energy. What are the forms in which its expendi- ture appears ? We may answer at once, heat and mechanical work; for it is assumed that internal movements, as those of the viscera, and all the friction of the body, all its molecular motion, all secretive proc
Size: 1365px × 1831px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1880, bookyear1889
