INDEX 597 



Serous cavities, peculiar epithelium lining, 546 

 fluid, 135' 

 membranes, 42 

 Serum-albumin, 1(>9, 114 



(whey, hutterniilk). Ill, 114, 117 

 Sex, mechanism of respiration varies according to, 146 



voice varies accordins to, 335 

 Shadows, judgment of form by, 447 

 Shaft of bones acting as levers, 304 

 " Sheath of Schwann," 461 

 Sheep, heart of, examined, 39, 46, 48 

 Shoulder joint, 318 

 Sighing, 146 

 Sight, long, near, and old, 413 



sensation of, 343, 344, 398 

 Single vision with two eyes, 415, 449 

 Skeleton (o-iceAAcj, 1 am dried up), 14 



weight of, 561 

 Skin, blood not rendered venous in the, 156 

 a double integument, 12, 535 

 an excretory organ, 23, 269, 565 

 kidneys affected by stat« of the, 187 

 a source of loss to the blood, 189 

 structure of, 191 

 weight of, 268, 561 

 SkuU, 8 



number of bones of, 16 

 Smell, organ of, 343, 361 

 ••Sniffing," 146, 361 



air drawn into olfactory chamber by, 366 

 Sneezing, 146 

 Sodium In bile. 214 

 Solids of the body, 562 

 Solidity, ^^sual judgment of, 450 

 Solitary follicles. 256 



glands, 256 

 Sound, conversion of sonorous vibrations into sensations of, 382 

 localisation of, 388 

 perception of, 367 



waves, transmission of, to inner ear, 371, 379 

 Sounds, cardiac, 57 



musical, 335, 384 

 Special senses, the, 343 et seq. 

 Spectacles, the use of, 412 

 Spectra, auditory. 441 



ocular. 441 

 Speech, mechanism of, 336 



Spiiincter (<T<i>i.yyio . I throttle or bind) muscle of bladder, 177 

 fibres of eye, 407, 408 

 of rectum, 164 

 Spinal accessory nerves, 501, 517 



bulb (meiluUa oblongata), 28, 69, 497, 502 



functions of. 519 

 cord, described, 9, 454, 465 



acts as independent nervous centre, 21, 486 



effect of galvanism on, 21, 472 



fissures of, 454 



grey matter of, 456, 458 



