Index. 



41 



Pancreatic juice, salts of, 170 



specific gravity of, 169 

 uses of, 170 

 Papillae of tongue, 31 f> 

 Parotid gland, 101 

 Parturition, 391 

 Penis, circulation in, 74 

 Penis, erection of, 378 

 Pepsin in gastric juice, 12f> 



action of, 126 

 Peptone, 7, 8, 127 

 Pericardial fluid, 2 

 Peritoneum, absorption from, 185 

 Perspiration, 193 

 Phaiynx, nerves of, 100 



during deglutition, 99 

 Phenol, 17, 151, 203, 214 

 Phosphates in body, 3, 22 

 Pigments, 11 

 Pigments, bile, 161 



urinary, 204 

 Pineal gland, 77 

 Placenta, 386 



Pleura, absorption from, 1S"> 

 Plexus, gastric, 289 

 Pneumogastric nerve, gastric branches 

 of, 141, 157 



nerve in rumination, 140 



nerve, respiratory fibres of, 91 

 Pons varolii, 280 

 Portal vein, 389 

 Potassium in body, 19 



urine, 205 

 Pouches, guttural, 317 

 Pregnancy, duration of, 390 

 Prehension of food, 96 



of liquid, 97 

 Prostatic fluid, 378 

 Proteids, 6 



absorption of, 189 



decomposition of, 151 



gastric digestion of, 130 



intestinal digestion of, 143 



of sweat, 193 



tests for, 10 

 Proteose, 8 

 Ptyalin in saliva, 104 

 Puberty, period of, 381 

 Pulse, 67 



wave, 67 

 Pupil of the eye, 303 . 

 Purple visual, 306 

 Putrefaction in intestines, 150, 152 

 Pylorus, duodenal curve of, 113 



of stomach, 113 

 Pyramidal tracts, 265 



Ratio, nutritive, 235 

 Rearing, physiology of, 348 

 Rectum, absorption from, 150 



Rectum, contents of, 150 



reaction of, 150 

 Reflex action, 268 



as a motor act, 269 



as a secretory act, 269 

 Refraction, 295 

 Renal capsule, 77 

 Rennin in gastric juice, 125, 126 



action of, on casein, 126, 394 

 Respiration, 78 



carbon of, 93 



carbonic acid of, 88 



centre for, effect of blood upon, 

 92 



centre for, in medulla, 91 



changes in air during, 83, 93 



changes in blood during, 83 



chemical aspects of, 85 



during rumination, 81 



effect of muscular exertion on, 81, 

 94 



gases of, 84, 94, 95 



influence on circulation, 64, 82 



movements of diaphragm in, 79 



movements of nostrils during, 82 



muscles employed in, 80 



nervous mechanism of, 91 



number of, 81 



oxygen absorption during, 87 



pressure in trachea during, 81 



quantity of air breathed, 92, 94 

 Respiratory passages, absorption from, 



183 

 Respiratory quotient, 84, 93 

 Reticulum, function of, 132 



reaction of, 131 

 Retina, the, 304 



action of light on, 295 



corresponding points of, 309 



rods and cones of, 306 

 Rigor mortis, 252 

 Rising, act of, 350 

 Rumen, 130 



cellulose digestion in, 132 



function of, 132 



muscular action of, 131 



reaction of, 131 



use of, 131 

 Rumination, 138 



effect of saliva on, 103 



muscular assistance in perform- 

 ance of, 140 



nervous mechanism of, 140 



(esophageal groove in, 138 



respirations during, 81 



salivary secretion during, 140 



Saliva, 101 



action on starch, 103, 104 

 amylolytic action of, 104 



