INDEX 



753 



Nitrogenous equilibrium, 434 



foods, 322 



output, 436 



substances, 79 



Nitrous oxide, effect of breathing, 304 

 Nodes of Ranvier, 66 

 Nceud vital, 297 

 Nostrils, respiratory movements of, 



279 



Nuclear matrix, 18 

 Nuclei of optic thalamus, 586 

 Nucleic acid, 92 

 Nucleins, 92 

 Nucleoli, 19 

 Nucleoplasm, 18 

 Nucleoproteins, 92 

 Nucleus, 9, 1 8 



ambiguus, 619 



ruber, 585 



structure of, 18 



OBESITY, 442 

 Ocular fixation, 699 

 Odontoblasts, 53, 56 

 Oils, as food, 325 

 Olfactory apparatus, 643 



bulb, 645 



center, 605 



glomeruli, 605 



membrane, 646 



nerve, 605 



tract, 606 



Olivary bodies, 569, 571 

 Olive, accessory, 571 



superior, 577 

 Onkograph, 415 

 Onkometer, 414 

 Ophtha 1 moscope, 690 

 Opsonins, 147 

 Optic center, 604 



nerve, 668 



thalami, 586 

 Optical apparatus, 673 

 defects in, 683 

 Organ of Corti, 653 

 Organized ferments, 372 

 Osmosis, 148 

 Osmotic pressure, 149 

 Osseous labyrinth, 650 

 Ossicles of ear, 615 

 Ossification, 46 



center of, 47 

 48 



Ossification in cartilage, 47, 51 



in membrane, 46, 51 

 Osteoblasts, 47 

 Osteoclasts, 49 

 Osteogenetic fibers, 47 

 Output of energy, 454 

 Ovaries, 719 



relation to metabolism, 460 

 Oviducts, 722 

 Ovulation, 723 

 Ovum, 720, 722 



changes in, following impregna- 

 tion, 728 



prior to impregnation, 727 

 Oxalic acid in urine, 412 

 Oxygen, amount excreted, 433 



in expired air, 286 



in tissues, 295 



determination of, in air, 311 

 Oxyphile, 130 



PACINIAN corpuscles, 75, 358 

 Pain, sense of, 636 

 Pancreas, 357 



enzymes of, 360 

 extirpation of, 459 

 extract of, 360 

 internal secretion of, 459 

 islands of Langerhans in, 358 

 secretion of, 359 

 structure of, 357 

 Pancreatic digestion, 353, 384 



cleavage products of, 385 

 fistula, 359 

 juice, 359, 384 



artificial, 385 



chemical characters of, 384 



composition of, 360 

 conditions influencing action 



of, 364 

 enzymes of, 360, 385 



action of, 361, 364, 



385 

 secretion of, 384 



action of nerves on, 

 action of secretin 



360, 384 



Papillae of skin, 419 

 of tongue, 640 



Paralytic secretion of saliva, 330 

 Parathyroid glands, 456 

 Parietal association center, 608 



60 



