402 



PHYSIOLOGY 



Sertoli, cells of, 123 et seq. 

 Sex and diet, 114 et seq. 



and exchange of material, 26 

 and temperature of the body, 72 

 Siamese, 386 

 Sitophobes, 18 

 Skeleton of Neander valley type, 370 



et seq. 



Skoptzy, sect of, 152 

 Skull of Neander valley type, 370 et seq. 



See also Cranium 

 Smegma, clitoridis, 185 



praeputii, 185 

 Socio-physiology, 325 

 Somatopleure, 213, 230 

 Spaniards, 327 

 Spaying, 208 

 Species, collective, human genus as, 



376 

 human, origin and development of 



different, 367 et seq. 

 reproduction of, 120 

 Sperm. See Semen 

 Spermatid, 124 

 Spermatoblast, 124 

 Spermatocyte, 124 

 Spermatogenesis, 124 

 Spermatogonia, 124 

 Spermatorrhoea, 137 

 Spermatozoon, 121 et seq. 



chemical composition of, 126, 154 

 copula externa and interna between 



ovum and, 194 

 differential characteristics between 



ovum and, 199 

 fertilisation of ovum by, 187 

 influence of chemical substances and 



of temperature on, 127 

 influence of prostatic secretion on, 



137 



movements of, 126, 189 

 number of, in semen, 126 

 positive and negative chemotaxis of, 



127, 188 



rheotaxis of, 189 

 vitality of, 127 

 Spermids, 121 

 Spermine, 126, 154 



physiological importance of, 154 

 Spheres of segmentation, 211 

 Sphincter, internal, of bladder, 147 

 of the prostatic and membranous 



urethra of Henle, 147 et seq. 

 Spices, 39 



in nutrition, 39 

 Splanchnic nerves, 247 

 Splanchnopleure, 213, 230 

 Starvation. See Inanition 

 Steatopygia, 336 

 Stigma, 167 



Stratum, cellular, of Langhans, 219 

 Substances, nutritive. See Foods 

 Sudanese, 343 



Sulci, limiting, of His, 228 

 Suprarenal capsules in old age, 303 

 Surface, bodily, and exchange of 



material, 25 



Survival, of different organs when de- 

 tached from body, 314 

 of human personality, 320 

 Swedes, 338 

 Swiss, 336 

 Syhcytium, 219 



of chorion, 219 et seq. 

 System, generative, of female, 160 et seq. 

 generative, of male, 120 et seq. 

 muscular, in human races, 333 et seq. 

 nervous, and regulation of metabolism, 



85 



as centralising, dominating, and 

 regulating force of all the func- 

 tions, 153 

 as regulator of thermogenesis, 69 



et seq., 82 et seq. 

 function of, in human races, 347 



et seq. 



of female genital organs, 245 et seq. 

 thermic effect of injuries to, 82 



et seq. 



vasomotor, and equilibrium of 

 thermic balance, 77 et seq. 



Tachypnoea, thermic, 81, 354 



Tahitians, 343, 356 



Tarantchis, 341 



Tatooing, 328 



Tciucci, 353 



Tea, 39 



Teeth, during pregnancy, 244 



in childhood, 283 

 Tehuelcis, 384 

 Temperature, daily variations in, 67 



external, and processes of oxidation, 

 77 



in different classes of vertebrates, 63 



influence of age on, 72 



influence of clothing on, 75 et seq. 



influence of day and night on, 70 et seq. 



influence of drugs on, 79 



influence of muscular and psychical 

 activity on, 73 et seq. 



influence of nutrition on, 73 



influence of, on spermatozoa, 127 



influence of race on, 73 



influence of season on, 73 



influence of sex on, 72 



influence of sleep on, 70 et seq. 



injuries to the nervous system and, 

 82 et seq. 



inversion of curve of, 70 et seq. 



of different parts of body, 65 et seq. 



regulation of, 74 et seq. , 82 et seq. 

 Testicle, external secretion of, 121 et 

 seq., 136 et seq., 153 



influence of, on organism as a whole, 

 152 et seq. 



