INDEX 



787 



Hairs, 478 



Haustra, 204 



Haustral contractions, 205 



Hearing, sense of, 713 



Heart, 264 



action of sympathetic nerve on, 316 

 319 



of vagus nerve on, 318, 321 

 auriculo-ventricular bundle, 271 

 conduction system of, 303 

 beat, nature of the stimulus, 305 



action of inorganic salts, 307 



cardio-pulmonic vessels, 267 



frequency of, 290 



influence of psychic states, 326 



theory of, 309 



of the excised heart, 298 

 blood-supply, 294 

 causes of the variations of, 326 

 compensatory pause, 311 

 coronary arteries, 295 



effects of ligation, 297 



time of filling, 295 



vaso-motor fibers for, 296 

 course of blood through, 266 

 curve of the systole and diastole, 277 

 cycle of, 275 

 electric currents of, 290 

 electro-cardiogram, 292 

 extra-systole, 311 

 fibrillary contraction, 297 

 idio-ventricular rhythm, 304 

 interauricular band, 273 

 intra-auricular pressure, 286 

 intracardiac nerve- cells, 314 

 intraventricular pressure, 282, 342 



curve, 283 



distribution of, 342 



Keith-Flack node, 272 

 mechanics of, 273 

 modifications of beat due to the action 



of drugs, 326 

 muscle-band of His, 270 

 muscle-fibers of, 269 

 negative pressure of, 283 

 nerve, mechanism of, 312 

 orifices and valves, 268 

 origin and distribution of the sympa- 

 thetic nerves to, 314 

 origin and distribution of the vagus 



nerve to, 315 



physiologic anatomy of, 264 

 refractory period, 311 

 relative function of auricles and ven- 

 tricles, 281 



Heart sounds, 280 



synchronism of the two sides, 281 



valves, action of, 279 



ventricular systole, 285 



the pre-sphygmic period, 286 

 the post-sphygmic period, 286 

 the sphygmic period, 286 



work done by, 380 

 Heart-muscle, properties of, 299 



action currents, 290 



automaticity, 306 



conductivity, 300 



electric currents of, 290 



electro-cardiograms, 292 



irritability, 299 



response to the action of an artificial 

 stimulus, 310 



rhythmicity, 305 



tonicity, 306 

 Hearing, sense of, 728 



physiology of, 734 

 Heat dissipation, 452 



mechanism of, 453 



mechanism of, 451 



production, 445 



influence of the nerve system, 455 



relation to work, 451 



rigor, 65 



Helmholtz's theory of color perception, 726 

 Hematin, 252 

 Hemianopsia, 629 

 Hemoglobin, 244 



absorption spectra of, 249 



carbo-hemoglobin, 252 



carbon-mono xid, 251 



chemic composition of, 245 



quantity of, 245 

 Hemoglobinometer, Gowers', 246 



Haldane's, 247 

 Hemolysis, 244 

 Hemometer, v. Fleischl's, 248 

 Heparin, 263 



Hering's theory of color perception, 724 

 Histons, 14 



Hormone, definition of, 174 

 Horopter, 722 

 Hunger, 116 

 Hypermetropia, 715 

 Hyperpnea, 437 

 Hyperthyroidism, 497 

 Hypoglossal nerve, 655 



Ileo-colic sphincter, 203 

 Incus, 730 

 Indol, 206 



