SUBJECT INDEX 



577 



Organogenesis, 489 



Orientation on surfaces, 46, 52, 110,-231 



Osmometer, 39, 511, 533 



Osmosis, electrical, 139, 142, 534 



negative, 140 

 Osmotic growths, 134, 466, 544 

 pressure, 35 et seq. 

 and growth, 466 

 and secretion, 185 

 and tui-gor, 190, 467, 515 

 and vapour pressui'e, 41 

 of blood, 302, 303 

 of colloids, 43, 84 

 of electrolytes, 41 

 of urine, 199 

 Ossicles, auditory, 251 

 Oxidase, 120 



Oxygen, caloric equivalent of, 30, 198 

 consumption of by glands, 184 

 by heart, 370 

 by kidneys, 198 

 by muscle, 171 

 by organism, 480, 492 

 by respiratory muscles, 400 

 tension and barometric pressure, 352 

 in air, 322 



in alveoli of lungs, 322 

 in arterial blood, 341 

 in tissues, 328 

 in venous blood, 341 

 transport, 325-332 

 Oxyhsemoglobin, 325, 326, 327, 328 

 acidity of, 335, 433 

 dissociation of, 327, 328, 329, 330, 331 

 salts of, 335, 337, 433 



Pacinian corpuscle, 239 

 Pain, 239 



spots, 241 

 Parchment paper for dialysis, 559 

 Parthenogenesis, 489 



artificial, 487 



stages of, 489-490 

 Partial pressure of gases, 38 

 Pellation, 36, 46, 363 

 Perilymph, 258 

 Peripheral resistance in vascular system, 



367 

 Peristalsis, 418 



gastric, 248 

 Permeability as affected by calcium, 140, 

 153 



differential, 145 



selective, 145 

 Peroxidase, 120 

 Phagocytes, 191 

 Phanerosis, 148, 211, 493 

 Phase rule, 73 



Phases of action of gland, 182, 183 

 of muscle, 171-174 



of growth, 471 

 Phasic receptors, 237, 240 

 Phonocardiogram, 386 

 Phosphate buffer system, 433, 575 

 Photosynthesis, 17, 456 



Phototaxis (lieliotropism), 151, 455 et seq. 

 Pigment and heat regulation, 440 



cells stimulated by light, 212 



of iris, 71 



of retina, 286 

 Pitch, 407 

 Plasma (blood), 301 



coagulation of, 303 et seq. 



coUigative properties of, 301 



colloids of, 302 



composition of, 302, 310 



crystalloids of, 310 



function of, 300 



osmotic pressure of, 302, 303 



oxygen, carrying power of, 324 



^H of, 301, 431 



refractive index of, 302 



separated, 301, 324 



specific gravity of, 301 



" true," 302, 324 



viscosity of, 301 

 Plasmolysis, 133 

 Poikilothermic organisms, 436 

 Poisson's ratio, 207 

 Polarimeter, 129 

 Polarisation at electrodes, 145 



currents, 154, 228 



negative, 228 



of light, 80, 128 



of membranes, 145 



positive, 231 

 Pole-findmg paper, 142 

 Postural receptors, 240, 242 

 Potassium, effect on living cell, 162 



in surface layers, 185 



radioactivity of, 159 



soaps, 107 

 Potentiometer, 523 

 Precipitation of sols, 92, 535 



mutual, 95, 535 

 Prepyloric sphincter, 417 

 Presbyopia, 284 

 Pressure and growth, 204, 478 



pattern theory of hearing, 263 



receptors, 240 

 Proprioceptors, 242 



Protective action of emulsoids, 93, 535, 530 

 Proteins as colloids, 94 



digestion of, 417, 418 



energy of, 26 



function of, in preserving neutrality, 

 430, 433 



isoelectric points of, 90, 91, 92, 176, 532, 

 533 



synthesis of, 19 

 Protoplasm, 2, 148, 150 



as an emulsion, 108 



Brownian movement in, 222 



colloidal nature of, 33, 148-150 



liquid nature of, 33, 148 



structure of, 148-150 



water content of, 148 

 Proximate principles of food, 20 

 Pseudo-activation of enzymes, 121 

 Pseudo-adsorption, 135 

 Pseudo-colloid. 101 



37 



