INDEX. 



Tissues, contractile, 54168 

 nervous, 169185 

 vascular, 186352 

 digestive, 355525 

 respiratory, 526 631 

 relative proportions of, in the 



body, 789 

 metabolism of, 822 

 their death gradual, iv. 418 

 Tone, arterial, 308 



,, dependent on vaso-motor action, 



319, 327 



,, centre for, in medulla, 323 

 ,, intrinsic nature of, 329 

 ,, maintained by automatic action 



of cord, 922 



of skeletal muscles, 922 

 ,, due to central nervous 



system, 923 

 Tones, musical, fundamental and partial, 



iv. 224 

 Tongue, papillae of, iv. 255 



,, localization of taste, sensations 



in, iv. 262 



Torcular Herophili, 1133 

 Tortoise, persistence of ventricular beat 



in, 285 

 ,, heart-beat in, independent of 



cardiac nerves, 288 

 ,, ,, action of atropin on, 301 



Touch-cells, in epidermis and elsewhere, 



iv. 273 

 Touch-corpuscles, structure of, iv. 270 



,, distribution of, iv. 271 



Trabeculse of lymphatic glands, 492 



,, of spleen, 735 

 Trachea, structure of, 530 

 ,, nerve supply to, 534 

 ,, effect on respiration of its 



closure, 593 

 Tract, optic, course of, 1074 



,, ascending antero-lateral, 874, 895 



,, descending antero-lateral, 873 



cerebellar, 874, 890, 950 



,, as to functions of, 1102 



median posterior, 874, 891 



' ,, ,, as to functions 



of, 1103 



,, pyramidal, crossed, 872, 888 

 direct, 873, 889 



,, ,, relations to volition, 



1044, 1056, 1059 



Tracts, afferent, in spinal cord, 1094 

 ,, internunical, for afferent impulses, 



1104 

 Training, effect of in brain action, 



1069 



Transudation into lymph spaces, 503 

 ,, not merely a nitration, 504 

 ,, conditions determining, 505 

 ,, opposite currents of, through 



capillary walls, 506, 520 

 Trapezium, 960 

 Traube-Hering curves, their origin, 622 



Traube-Hering undulations in kidney, 



660 



,, variations in cerebral blood- 

 pressure, 1136, 1137 

 Tricuspid valves, 230 

 Trypsin, a constituent of pancreatic juice, 



414, 426 



,, in the foetal pancreas, iv. 389 

 Trypsinogen, an antecedent of trypsin, 414 

 Tube, Fallopian, iv. 351 

 Tubereulum acusticum, 959 

 Tubules, seminal, course of, iv. 365 



,, structure of, iv. 366 

 uriniferous, structure of, iv. 634, 



641 



,, convolutions of, 636 

 epithelium of the, 665 

 ,, work of the, 671 

 ,, special substances ex- 



creted by, 666 



Tubuli seminiferi, see Tubules, seminal. 

 Tunica?, intima, media and extima of 



arteries, 193 



Tunica muscularis mucosae, 378 

 ,, albuginea, iv. 365 

 ., vaginalis, iv. 365 

 Tuning-fork for the measurement of velo- 

 city, 70 

 Tympanum of ear, iv. 179 



,, conduction of sound through, 



iv. 181, 190 



,, structure and relation s,iv. 182 



membrane of, iv. 185 



,, muscles of the, iv. 194 



,, its connection with sense of 



outwardness of sounds, iv. 

 242 



Tyrosin, a product of pancreatic diges- 

 tion, 427 



,, chemical composition, 428 

 , , a result of proteid decomposition 

 outside the body, 759 



Umbilical cord, formation of, iv. 377 

 arteries, growth of, iv. 377 

 - ,, pressure in, iv. 383 



,, ,, venous blood in the, iv. 



384 



,, vein, pressure in, iv. 383 

 Undulations, respiratory, phenomena of, 



614, 618 



,, luminous, iv. 84 

 Unit, physiological, defined, 6 

 Urari, the nature of its action, 57, 86 

 ,, its effect on cells of pigment epi- 

 thelium of retina, iv. 70 

 diabetes in frogs produced by, 



733 



Urea, a constituent of the blood, 51 

 ti chemical relations of, 649 

 ,, as nitrogenous waste, 102, 632, 



750, 754, 759 



,, absent from muscle, 102, 751 

 ,, its relations to kreatin, 750, 752 



