446 



THE BODY AT WOEK 



Nerve-force, improper use of expression, 



281 

 Nerve-impulses, distribution in grey 



.matter, 305 

 reinforcement of, 320 

 resistance to, at synapses, 306 

 Nerve-nets, pericellular, 301, 319 

 Nervous system, neuronic and extra- 



neuronic conduction, 310 

 phylogeny of, 332 

 Neuro-fibrillae, 298 

 Neurone, origin of term, 293 



transmission of current by, 328 

 various types of, 296, 323 

 Night-blindness, 378 

 Nissl's bodies, source of nervous energy, 



320 



Nitric oxide, combination with haemo- 

 globin, 186 

 Nitrogenous equilibrium, 150 



food, stimulating effect of, 157 

 waste, 210 



Nceud vital of Flourens, 176 

 Normal diet, 151 

 Normal salt solution, 82 

 Nucleo-proteins, source of uric acid, 215 



Odours, classification of, 366 

 (Edema, or dropsy, 42 

 Olfactory membrane, structure, 366 

 Optic nerve, number of fibres, 378 

 Organ of Corti, structure, 415 



theory of function, 417 

 Organs that have lost their prime func- 

 tions, 87 



Orientation, sense of, 335 

 Osmosis, 40, 128, 201 



cause of muscular contraction, 235 

 Osteoblasts, bone-forming cells, 32 

 Osteoclasts, bone-eating cells, 65 

 Oxygen, amount required per diem, 166 



carried by red blood-corpuscles, 66 



Pain, influence of, upon action, 359 



referred from viscera to surface of 



body, 316 



relation to sensation, 313, 425 

 theory of, 312, 425 

 Pancreas, structure, 116 

 Pancreatic juice, constitution, 116 



fat-splitting ferment of, 133 

 Papillae of the tongue, various forms of, 



97 



Parathyroids, 86 

 Pepsin, digestive action, 115 

 Peptone prevents coagulation of blood, 



77 



Pericellular nerve-nets, 301 

 Perspiration, cools the surface of the 



body, 236 

 repressed during fever, 257 



Peyer's patches of lymph -follicles in 



intestine, 53 

 Phagocytes, germ-eating leucocytes, 60 



consumption of red blood - cor- 

 puscles by, 82 

 Phosphenes, developed by pressure on 



eyeball, 383 



Phosphorescence, cause of, 291 

 Phrenology, 343 



Pictures, suggestion of solidity in, 401 

 Pineal body, phylogeny, 334 

 Pituitary body, 93 

 Plants, anaesthetized by ether, 12, 24 



their metabolism, 15 



their respiration, 24 

 Pleura, lining membrane of chest, 172 

 Pleurisy, pain of, 313 

 Pleuritic fluid, absorption of, 223 

 Pneumonia, changes in lung during, 169 

 Portal system of bloodvessels, 80 



regulator of vascular tone, 236 

 Power of muscles, 285 

 Precipitins formed in blood, 19 

 Proteins, absorption by alimentary 

 canal, 145 



chemical constitution, 6 



dietetic value, 157 



fate after absorption, 212 

 Protopathic nerves, 425 

 Protoplasm, arrangement in cells, 30 



constitution, 7 



Huxley's definition, 6 

 Pulse, cause of, 244 



records of, 245 



variations, 247 



Purgatives, theory of action, 128 

 Purkinje ceUs of cerebellum, 303, 340 



shadows of retinal vessels, 375 

 Pus, origin of, from leucocytes, 57 

 Pyramids of cortex of great brain, 346 



Rabbit's ear, vaso-motor changes in, 235 

 Receptor, an organ specially sensitive 



to stimulation, 253 

 Referred pains from viscera, 316 

 Reflex action, inhibition of, 311 

 of scratching, 330 

 vinegar experiment with frog, 



307 



Regeneration of nerves, 326 

 Renal-portal circulation, 199 

 Renewal of tissues, 148 

 Rennin, ferment of milk, 16 

 Resistance in nervous system, laws of, 



177, 307 



Respiration, artificial, 179 

 effect on circulation, 221 

 a function of protoplasm, 23, 164 

 movements of, 171 

 nervous mechanism, 175, 179 

 in tissues, 165, 193 



