INDEX. 



647 



Process, vermiform, 414 

 Processus gracilis, 529 



a cerebello ad testes, 419 

 Prostate gland, 573 



functions of secretion unknown, 



577 



Protagon, 69 

 Proteids, 199 

 Protein-compounds, 22 

 Protoplasm, 27, 71 

 Ptyalin, action of, 212 

 Puberty, changes at period of, 567 

 indicated by menstruation, 569 

 Pudenda, 563 



Pulmonary artery, valves of, 94, 105 

 capillaries, 159 

 circulation, 89 



influence of carbonic acid on, 



187 

 of pneumogastric nerve 



on, 44J 



velocity of. 149 

 Pulp of hair, 302 



of teeth, 51 

 Pulse, arterial, 123 

 cause of, 123 

 dicrotous, 129 

 difference of time in, 124 

 explanation of, 126 

 frequency of, 108 

 influence of age in, 109 



of food, posture, &c., 109 

 observations on with sphygmo- 



graph, 124-126 

 relation of to respiration, 110 

 tracings of, 126, 129 



in large arteries, 128 

 in radial artery, 128 

 variations in, 109, 110 

 in capillaries, 135, 136 

 Pupil of eye, office of, 506 



relation of third nerve to, 426 

 Purgative action of bile, 262, 263 

 Pus, contains albumen, 22 

 Putrefaction. See Decomposition. 



arrested by gastric fluid, 221 

 Pylorus, structure of, 215 



action of, 231, 232 

 Pyramidal portion of kidney, 350 

 Pyramids of medulla oblongata, 404, 

 405 



Quadrupeds, retinae of, 523 



Radiation of impressions, 385, 395 

 Rectum, 248 



evacuation of, a reflex act, 399 



mechanism of, 234 

 Reflexion of impressions, 285 



Reflexion by medulla oblongata, 406 



by spinal cord, 395 

 Reflex actions, 385, 399 

 in accidents, 400 

 conditions necessary to, 386 

 in disease^ 400 

 examples of, 396, 399 

 excito-motor and sensori-motor, 



398, note. 



general rules of, 385 

 independent of mind, 386, 396- 



399 



influence of cord on, 396, 400 

 irregular in disease, 386 



after separation of cord from 



brain, 396-399 

 purposive in health, 386 

 relation of fifth nerve to, 430 

 relation to volition, 399 



to walking, running, Ac., 



400 



sustained, 386 

 in tetanus, Ac., 401 

 Reflex functions of medulla oblongata, 



406 



of spinal cord, 396 

 Refraction, laws of, 505 

 Refracting media of eye, 505 

 Renal arteries, arrangement of, 352 



veins, blood of, 80 

 Repair. See Nutrition. 



retarded in paralyzed parts, 308 

 Repetition, nutritive, 305 

 Reproduction, nutritive, 305 

 Reserve air, 167 

 Residual air, 167 

 Respiration, 155 



abdominal type of, 163 

 ammonia and other products ex- 

 haled by, 179 



carbonic acid increased by, 173 

 changes of air in, 173 



of blood in, 179 

 costal types of, 163 

 force of, 168-171 

 frequency of, 168 

 influence of brain on, 398 



of medulla oblongata, 185- 



186, 405-408 

 of pneumogastric nerve, 406, 



440 



mechanism of, 161 

 movements of, 162. See Respira- 

 tory Movements. 

 of air in, 171 

 of blood in, 172 

 nitrogen in relation to, 177 

 oxygen diminished by, 177 

 quantity of air changed in, 166 

 relation of to the pulse, 110 

 structure of organs of, 156-161 



