384 



INDEX. 



Nerves, cervical sympathetic of frog, vaso- 

 constrictor fibres in, 

 326-328, 332, 341 



,, ,, not exclusively vaso- 



constrictor, 332 

 ,, chorda tympani, vaso-dilator fibres 



in, 329, 332 

 ,, depressor, vaso-motor functions of, 



343, 344, 375 

 inhibitory, 186 

 ,, pneumogastric, see Nerve, vagus 

 ,, sciatic, constrictor and dilator 



fibres in, 332, 333, 344 

 ,, spinal, 172 

 ,, ,, anterior and posterior roots 



of, 173 

 ,, ,, accessory, cardiac-inhibitory 



fibres in, 313-316 

 thoracic, 342 

 Nerve cells of spinal cord, 179, 180 



ganglia, 175,;178, 179 

 ,, of splanchnic ganglia, 178, 



179 



,, of cardiac ganglia, 296 

 ,, spiral, 179 



Nerve fibres, their structure, 116-123 



medullated, 118-120 

 ,, non- medullated, 122 



,, efferent and afferent, 173 



revehent, 174 

 ,, in spinal cord, 180, 185 



,, vaso-constrictor and vaso- 



dilator, 331 



,, ,, course of, 335 



,, vaso-dilator, course of, 337 



Nervi erigentes, vaso-dilator fibres of, 341 

 Nervous system, central, cells in grey 



matter of, 179 



Nervous system, central, centres for auto- 

 matic and reflex actions in, 181 

 ,, vaso-motor functions of, 



340, 345 

 Neurilemma, defined, 117, note 



,, structure of, 119 

 Neurin, 123 

 Neuroglia, 180 

 Neurokeratin, 119, 124 

 Nicol prism, 95 



Nitrogen, proportion of, in proteids, 17 

 Nitrogenous waste not increased by 



muscle contraction, 106, 108 

 Node of Ranvier, 117 

 Notch, dicrotic, in pulse-tracings, 281 

 Nuclear network in white corpuscles, 47 

 Nuclein in white corpuscles, 40 

 ,, a modified proteid, 43 

 Nucleolus in ganglionic cells, 176 

 Nucleus of white corpuscles, how shewn, 



39 



of neurilemma, 119 

 ,, of non-medullary nerve fibre, 122 

 of a ganglionic cell, 176 



Oil, clotting of blood retarded by, 21 



' Out-put ' of blood by ventricle, 247 

 ,, increased by augmentor 



action, 317 

 Oxygen, its absorption by the living 



body, 2 



borne by the blood to the tis- 

 sues, 13 



. in proteids, 17 

 borne by haemoglobin, 33-35 

 ,, presence of, necessary to ner- 

 vous irritability, 154-156 

 ,, consumed during muscular con- 

 traction, 154 



Pallor caused by emotion, 352 

 Palpitation of heart, causes of, 369 

 Paraglobulin, a constituent of blood 



serum, 19 



precipitated from plasma, 23 

 Pendulum myograph, 72 

 Pericardial fluid, its persistent fluidity 



in pericardial bag, 28 

 Peripheral resistance, defined, 213 



,, ,, its action in the circula- 

 tion, 220 



,, illustrated by model, 217 

 ,, ,, lowered by action of de- 

 pressor nerve, 344 

 ,, affected by vaso-motor 



changes, 338 



,, ,, by condition of vas- 

 cular walls, 360 



,, by changes in cha- 

 racter of blood, 

 360 



, , zone in capillary contents, 356 

 Peripheral zone, white corpuscles present 



in, 357 

 ,, blood platelets in, during 



inflammation, 358 

 Peristaltic contractions of plain muscle, 



161 



Phagocytes, 47, 48 

 Phosphates in muscle ash, 104 



,, in nerve ash, 125 

 Phosphorus, a constituent of nuclein, 



40 

 ,, ,, ,, of serum, 51 



of lecithin, 123 

 Physiology, divisions of, 3 

 ,, problems of, 9 

 Physiological unit defined, 6 

 Pigment, yellow, of serum, 51 



,, of bile, formation of, from he- 

 moglobin, 38 

 Plasma-corpuscles in connective tissue, 



191 

 Plasmatic layer in capillary contents, 



356 



Plasmine, properties of, 23 

 Plateau, systolic, 247 

 Platelets, blood, 30, 48, 358 

 Plethysmograph, principles of its action, 

 224, 228, 248 



