Sectarianism, 55 Sects, medical (_v. Schools_) Self-control, 47 Self-education, 279 Semen, 131, 233 Sensation, 47 Septum, perforated, between ventricles of heart, 321 Serum (watery part of blood or milk), 91, 213 Shaping (development of organs), 19 Sieves, 91 Skin-diseases, 253 (_v._ also _Leprosy_ and _Lichens_) Slaves, 103 Sociability, 47 Sophistry, 219, 279 Sophists, 7 Soul, 45 Specific selection of nutriment by tissues (_v. Attraction, physiological_) Spermatic ducts, 57 Spirit (_v. Pneuma_) Spleen, function and diseases of, 205 "uselessness" of, 143 as an emunctory of the liver, 277 Statues, 129 Sting-ray (fish), bite of, 85 Stoics, 15, 145 Stomach, function of, 197, 237, 251, 255 coats of, 261 independent habits of, 271 give-and-take between it and liver, 291 Stone in bladder, 51 Strength, relative, of different organs, 293 Substance, 9 Superfluities (waste-substances), 35, 291 Swallowing (_v. Deglutition_) Symptoms, 13 Synapse, 147 Teeth, 253 Temperament (crasis, mixture of elementary principles), 15, 139, 193 Temperance, 47 Theophrastus, 139 Thorns, drugs for extracting, 83 Tissues, development of, 21 their action in producing humours, 179, 195 Trachea (windpipe), 305 Transference (passive motion), 7 Transpiration, 153 Treatment, principles of, 199 Tricuspid orifice of heart, 321 Tubes, rigid, 119, 317, 325 Unity of organism, 61 Ureters, 23, 51 Urine, 51 "Useless" organs (Erasistratus), 143 Uterus (womb), 227 Vacuum, tendency to refill (_v. Horror vacui_) Valves of heart, 121, 315 Vaporisation (_v. Evaporation_) Vegetable diet, 35, 179 Vegetative life, 3 Veins, structure of, 283 "arterial" (_v. Pulmonary artery_) coronary, 323 hepatic, 147 mesenteric, 293, 305 portal, 147 renal, 107, 143 vena cava (chief vein of body), 91 collapse of, 119 Ventricles of heart, communication between, 321 Vipers, 85 Vitalist School in Medicine, 45 Vivisection, 59, 241, 273 Voluntary motion, 3 Volvulus (intestinal obstruction), 299, 303 Vomiting, 241, 247, 267 fæcal, 299 Waste-products (_v. Superfluities_) Whey (_v. Serum_) Wine, 209, 329 Womb (_v. Uterus_) Wounds, 185 Wrestling, 125 Zeno, of Citium, 9 End of the Project Gutenberg EBook of On the Natural Faculties, by Galen