INDEX. 



371 



Respiratory movements, i, 184 

 axes of rotation, i, 184, etseq. 

 of air tubes, i, 175 

 of glottis, i, 188 



influence on amount of carbonic acid, 

 i, 193 



on arterial tension, i, 213 

 rate, i, 190 

 relation to pulse rate, i, 190 



size of animal, i, 190 

 relation to will, i, 201 

 various mechanism, i, 198 

 muscles, i, 183, et seq. 

 daily work, i, 189 

 power of, i, 191 

 nerve-centre, i, 202 

 rhythm, i, 188 

 sounds, i, 188 

 Restiform bodies, ii, 107 

 Rete mucosum, i, 333 



testis, ii, 247 

 Retif orm or adenoid, or lymphoid tissue, 



i 34 



Retina,' ii, 199 

 blind-spot, ii, 215 

 blood-vessels, ii, 203 

 duration of impressions on, ii, 216 



of after-sensations, ii, 216 

 effect of pressure on, ii, 229 

 excitation of, ii, 215 

 focal distance, ii, 206 

 fovea centralis, ii, 199, 215 

 functions of, ii, 215 

 image on, how formed distinctly, ii, 



203 



inversion of, how corrected, ii, 218 

 insensible at entrance of optic nerve, 



ii, 215 



layers, ii, 199 

 in quadrupeds, ii, 230 

 reciprocal action of parts of, ii, 226 

 in relation to direction of vision, ii, 



222 



to motion of bodies, ii, 222 

 to single vision, ii, 229 

 to size of field of vision, ii, 220 

 reflection of light from, ii, 217 

 structure of, ii, 199 

 vessels, ii, 203 

 visual purple, ii, 218 

 Rheoscopic frog, ii, 46 

 Rhinencephalon, ii, 289 

 Ribs, axes of rotation, i, 184, et seq. 

 Rigor mortis, ii, 37 

 affects all classes of muscles, ii, 37 

 phenomena and causes of, ii, 38 

 Rima glottidis, movements of in respira- 

 tion, i, 188 



Ritter's tetanus, ii, 49 

 Rods of Corti, ii, 184 



use of, ii, 192 



Rouleaux, formation of in telood, i, 76 

 Ruminants 



stomach of, i, 240 

 Rumination, i, 240 



Running, mechanism of, ii, 44 

 Rut or heat, ii, 240 



S. 



Saccharine principles of food, digestion 



of, i, 284 

 Sacculus, ii, 185 

 Saliva, i, 229 



composition, i, 229 



process of secretion, i, 235 



quantity, i, 230 



rate of secretion, i, 230 



uses, i, 230 

 Salivary glands, i, 226 



development of, ii, 297 



influence of nervous system, i, 231 



mixed, i, 229 



nerves, i, 229 



secretion, i, 228 



structure, i, 226 



true, i, 227 



varieties, i, 227 



Sarcode, i, 5. See Protoplasm. 

 Sarcolemma, ii, 16 

 Sarcosin, ii, 332 

 Sarcous elements, ii, 17 

 Scala media, ii, 183 



tympani, ii, 183 



vestibuli, ii, 183 

 Sclerotic, ii, 197 



blood-vessels, ii, 203 

 Scurvy from want of vegetables, i, 217 

 Sebaceous glands, i, 337 



their secretion, i, 343 

 Sebacic acid, ii, 340 

 Secreting glands, i, 322 



aggregated, ii, 323 



convoluted tubular, ii, 323 



tubular or simple, ii, 323 

 Secreting membranes, i, 319. See Mu- 

 cous and Serous membranes. 

 Secretion, i, 318 



apparatus necessary for, i, 318, et seq. 



changes in gland- cells during, i, 326 

 " " pancreas, i, 265 

 " " stomach, i, 244. 



1 " " salivary glands, i, 234 



circumstances influencing, i, 326 



discharge of, i, 326 



general nature of, i, 318 



influence of nervous system, i, 327 



process of physical and chemical, i, 

 324, 325 



serous, i, 320 



synovial, i, 321 

 Segmentation of cells, ii, 252 



ovum, ii, 252 

 Semen, ii, 251 



composition of, ii, 251 



emission of, a reflex act, ii, 103 



filaments or spermatozoa, ii, 247 

 purpose of, ii, 251 



tubes, ii, 247 



