650 



INDEX. 



Serous layer of blastodermic mem- j 



brane, 581, 582 

 Serous membranes, 315 

 arrangement of, 315 

 communication of lymphatics 



with, 280, 282 

 epithelium of, 315 

 fluid secreted by, 316 

 lining joints, &c., 315 



visceral cavities, 315 

 purpose of, 315 

 stomata, 282 

 structure of. 315 

 Serum, of blood, 72 



chief source of albumen, 22 

 separation of, 58, 72 

 Seventh cerebral nerve, auditory por- 

 tion, 533, 543 

 facial portion, 433 

 Sex, influence on blood, 76 



influence on production of car- 

 bonic acid, 174 

 relation of to capacity of chest, 



168 



to respiratory movements, 163 

 Sexual organs and functions in the 



female, 560, 572 

 in the male, 573, 578 

 Sexual passion, connection of with 



cerebellum, 417 

 Sighing, mechanism of, 181 

 Sight. See Vision. 

 Silica, parts in which found, 25 

 Singing, mechanism of, 483 

 Single vision, conditions of, 421 

 Sinus terminalis, 588 

 urogenitalis, 610 

 Sinuses of dura mater, 151 

 Sixth cerebral nerve, 426 

 Size of field of vision, 436-438 

 Skin, 332 



absorption by, 347 

 of gases, 348 



of metallic substances, 347 

 of water, 347 

 capillaries of, 136 

 cutis vera of, 334 

 epidermis of, 333 

 evaporation from, 349 

 excretion by, 344-348 

 exhalation of carbonic acid from, 



346 



of watery vapor from, 345 

 functions of, 332 



respiratory. 346 

 papilla of, 336-338 

 perspiration of, 344 

 rete mucosum of, 333 

 sebaceous glands of, 339 

 structure of, 333 

 sudoriparous glands of, 338 



Sleep, influence of on production of 



carbonic acid, 177 

 Smell, sense of, 494 

 conditions of, 494 

 different kinds of odors, 498 

 impaired by leeion of facial nerve, 



434 

 impaired by lesion of fifth nerve, 



431 



internal excitants of, 498 

 limited to olfactory region, 496 

 relation to common sensibility, 



496 



structure of organ of, 495 

 subjective sensations of, 498 

 varies in different animals, 498 

 Sneezing, caused by sun's light, 384 



mechanism of, 182 

 Sniffing, mechanism of, 184 



smell aided by, 495 

 Soda, salts of in blood, 74 

 in solids and fluids, 25 

 Sodium in human body, 25 



chloride of, in albumen, 22 

 Solid food, action of gastric fluid on, 



222 



Solitary glands, 241 

 Sonorous vibrations, how communi- 

 cated in ear, 536, e. s. 

 in air and water, 537. Se-e Sound. 

 Soprano voice, 483 

 Sound, conduction of by ear, 533 

 by external ear, 534-536 

 by internal ear, 540-543 

 by middle ear, 536-541 

 movements and sensations pro- 

 duced by, 546 

 perception of, 543 



of direction of, 544 

 of distance of, 544 

 a state of the auditory nerve, 



545 



permanence of sensation of, 545 

 produced by contraction of mus- 

 cle, 463 



production of, 543 

 subjective, 546 



Sounds as expressions of passion, 483 

 classified, 483 

 of heart, 105 



causes of, 106 



Sources of nervous force, 383 

 Spasms, reflex acts, 400 

 Speaking, 483 



mechanism of, 184 

 Special sense. See Senses. 

 Spectrum analysis, 78 



of blood, 78 

 ocular, 517-519 

 Speech, 486 



function of tongue in, 489 



