INDEX. 



1021 



521. Parotid, 31, 521. Submaxillary, 31, 



521. In animals, 581 

 Salivin, or ptyalin, 74. 546. 

 Salts, absorption of, 623. Of urine, 782. 



Of 



blood, 79, 712. Use of in body, 712. Des- 

 tination of in body, 902 



Sanguification, 97, 699, 729. In animals 750 

 751 



Sapidity, 378 



Sarcin or Sarcosin, 75 



Sarcode, movements of, 149 



Sarcolemma, 48 



Sarcous elements of muscle, 48 



Satiety, sensation of, 351 



Scalse of cochlea, 397 



Schneiderian membrane, 382 



Sclerotic, 419, 423 



SCOLECIDA. Digestive organs, 591. Respira- 

 tion, 871. Locomotion, 188 



Scolex, 937 



Scorbutus. or Scurvy, 713 



Sebaceous glands, 64, 361 



Sebaceous matter, 790 



SECRETION, 97, 751. Definition, 698, 751. 

 Performed by glands or membranes, 751. 

 Products of, like or different to those in 

 blood, 752. Products of, usually crystalloid, 

 753. Influenced by epithelial cells, 753; 

 by various conditions, 754 ; by quantity of 

 blood, 75 4; by quality of blood, 755 ; by 

 external stimuli, 755 ; by nervous system 

 on, 311, 755-757. Cause of different secre- 

 tions, 753, 754. Epithelial cells essential 

 to, 754. Constant, intermittent, or remit- 

 tent, 758. Special, in animals, 790. Move- 

 ment of, along ducts, 758. Compared with 

 nutrition, 759 ; with excretion, 752, 753 



Secretions, particular (see those Secretions) 



Secreting membranes and glands. 62 



Sediments, urinary, 783 



Segmentation of yolk, 951 



Segments of body, mode of balancing, 172 



Segments, dorsal, 960 



Semicircular canals of ear, 396, 408, 966 



Semilunar cartilages, 158 



SENSATION, 94, 218, 234, 300. Centres of, 267. 

 Conditions of, 336. Definition of, 335. Ef- 

 fect of repetition, 340. In general, 335. 

 Laws of, 338. Paths of in spinal cord, 269. 

 Special, 342. Suspension of, 341. Velocity 

 of impressions, 339. 



SENSATIONS. After-effects, 340. Associated, 

 340. Connected with circulating system. 



351. Connected with respiratory organs, 



352. Duration of, 339. Effect of alternat- 

 ing, 340, Internal or corporeal, 347 ; nerv- 

 ous, 348 ; muscular, 348. Outward projec- 

 tion of, 338. Peculiarities of, 340. Radiation 

 of, 274. Transference of, 274. Variety of, 

 341 



Senses of animals, special, 346 



Senses, 335. Varieties of, 341. Organs of 



(see Separate Senses) 

 Sensibility, property of nervous tissues, 88, 



218, 234 



Sensori-motor acts, 276, 302 



Sensorium, common, 285. True, 269, 286 



Sensory fibres of nerves, 222. Stimuli, 336; 



objective, 426 ; subjective, 337 

 Septum of auricles, 976. of ventricles, 976 

 Serous membranes, 62 



Serous secretions, 767. Chemical composition, 



767 



Serum of blood. 60 

 Shell and shell-membrane of egg, 945 

 Shouting, 817 

 Sighing, 213, 818 



SIGHT, 415-436. In animals, 472-480. In- 

 formation given by sense of, 454, 46 1. Long 

 and short, 444. Organs of, 415 

 Sigmoid flexure, 514 

 Singing, 268, 817 

 Single vision with two eyes, 456 

 Sinus urogenitalis, 957, 972. terminalis 



975 

 Sinuses of Valsalva, 635, 636. of auricles 



632, 635 

 Sipping, 500 

 Skeleton, 17 

 Skeleton, development of, 960. Vertebrate, 



development of, 989 



Skin, 24, 354, 790. In animals, 372. Develop- 

 ment of, 962. Fatty secretion, 791. Per- 

 spiration, 791-794. Exhalation of water by, 

 791; of carbonic acid, 794. Absorption of 

 oxygen by, 794 ; of nitrogen, 794. Inter- 

 rupted action of, 795 

 Skull and spinal column, cavity of, 26 

 Skull, development of, 961 

 Sleep, 313, 341. Amount required, 314. 

 Causes of, 314. Effect on animal heat, 875 

 Smell, 386. Acuteness of, 389. After-sensa- 

 tions of, 389. Conditions of, 386. Organs 

 of, 381. Organs and sense in animals, 390. 

 Sense of, 381 

 Snapping turtle, 893 

 Sneezing, 818 

 Snoring, 818 

 Sobbing, 818 



Socket or cavity of joints, 155 

 Softening, 705 



SOLIPEDS. Digestive organs, 584, 585. Di- 

 gestive glands, 595. Sight, 473, 474. Loco 

 motion, 178 

 Solitary glands of intestinal canal, 97, 604 

 Somatic death, 999 

 Somnambulism, 317 



Sound and its propagation, 399. colors, 

 401, 408. Communication and excitation 

 of, 401 



Sounds, pitch of, 203. Strength or intensity 

 of, 203. Tone or timbre of, 203. Their 

 production and modification, 203. Of heart, 

 647-651 ; characters of, 647 ; causes of, 648, 

 649 



Speaking, 213, 817 

 Species, reproduction of, 933, 938 

 Specific gravity of Human Body, 895 Of or- 

 gans (given with the Organs). Of animal 

 fluids and tissues, 70 (Table) 

 Spectra, 466 

 Spectroscope, 830 



Spectrum, solar, 431. Absorption or dark 

 bands of, 829. Color bands of, 829. 

 analysis, 830 ; of blood, 830 

 Speech, 213. Imperfections of, 215 

 Sperm-cell, 935, 940, 981 ; force, 949 

 Spermatozoa, 940, 950 

 Spermotheca, 936, 949 

 Spherical aberration, 435, 438 

 Sphincters, 517 

 Sphygmograph, 668-670 

 Spigelian lobe, 532 



