CONTENTS. 



PAGE 



Dissection of the extrinsic cardiac nerves of the frog, 86 



Effect of stimulation of the vago-sympathetic trunk upon the heart-beat, 87 



Reflex inhibition of the frog's heart, 88 



Effect of drugs upon the heart's action, 88 



Perfusion of frog's heart, 92 



Action of certain salts upon the heart muscle, ... 94 



Stannius' experiment, 95 



Maximal response of heart muscle to minimal stimulus, 96 



Refractory period, 97 



Dissection of mammalian heart, 97 



Dissection and relations of the extrinsic cardiac nerves, 98 



Direct observation of the pulsating mammalian heart, 98 



Stimulation of extrinsic cardiac nerves, 100 



Action of the heart valves, 101 



Mechanics of the circulation, 102 



Pulse record, in man, 106 



Volume pulse, 107 



Apex beat, cardiogram, and heart sounds, 109 



The vasomotor mechanism, no 



Record of the blood pressure in the rabbit, 113 



Perfusion of the rabbit's heart, 117 



Effect of temperature on the heart-beat, 118 



Estimation of human blood pressure, . 118 



CHAPTER VI. 

 SECRETION. DIGESTION. ABSORPTION. 



Secretion of saliva, 121 



Changes in the gland cells following chorda stimulation, . . . . .124 



Salivary digestion, " 125 



Mechanism of swallowing, 127 



The vagus as a motor nerve to the stomach, 129 



Gastric digestion, 130 



Intestinal digestion, 134 



Mechanism of pancreatic secretion, 138 



CHAPTER VII. 



INTERNAL SECRETIONS. 



Liver, glycogen, 140 



Pancreatic diabetes, 141 



[vii] 



