A conspicuous feature of the modern application of the sciences in the service of mankind has been the development of quantitative methods and the extension of their use in many fields. The physician of today deals with relatively exact figures in connection with basal metabolism, the circulating sugar and the nitrogenous catabolites of the blood, the respiratory gases, hydrogen ion concentration of tissue fluids and artificial solutions, the efficiency of the optical and auditory outfits of the organism, and the pressure of the blood—to cite illustrations of measurements unknown to physicians of a generation or two ago. Interest in the qualitative aspects of life has become supplemented by a realization of the advance that a better quantitative knowledge of the functions of the body is likely to promote.
It has recently been remarked that the circulation, respiration, production of heat, and performance of work are all merely parts of the
SOME FUNDAMENTAL FEATURES OF THE CIRCULATION. JAMA. 1925;85(15):1138–1139. doi:10.1001/jama.1925.02670150036013
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