xvi CONTENTS. 



PAGE 



174. The Depressor nerve 



175. Else of blood-pressure from stimulation of afferent nerves; pressor 323 



effects 325 



176. The limits of the medullary vaso-motor centre .... 326 



177. The relation of the medullary vaso-motor centre to other spinal 



vaso-motor centres. Nature of dilation, tone, and constriction 



of blood vessels 327 



178. Summary of vaso-motor actions 330 



179. Instances of vaso-rnotor actions. Blushing. Effect of warmth on 



skin 331 



180. Vaso-motor nerves of the veins 333 



SECTION VII. 

 THE CAPILLARY CIRCULATION. 



181. The normal capillary circulation. The axial core and the plasmatic 



layer 334 



182. Changes in the capillary circulation induced by irritants. The 



phenomena of inflammation 336 



183. The migration of the white corpuscles 337 



184. Stagnation or stasis. The diapedesis of the red corpuscles. Nature 



of the inflammatory changes ....... 338 



185. Changes in the peripheral resistance due to changes in the blood . . 339 



SECTION VIII. 



CHANGES IN THE QUANTITY OF BLOOD. 

 186. Effects of increasing and of diminishing the total quantity of blood 341 



SECTION IX. 

 A REVIEW OP SOME OF THE FEATURES OF THE CIRCULATION. 



187. The constant and variable factors 343 



188. Variations in the circulation due to variations in the distension of 



the cavities 344 



189. Influence on the heart-beat of the supply of blood, and other 



nutritive conditions ......... 344 



190. Causes of an irregular heart-beat 345 



191. Causes of the sudden cessation of the heart-beat, and sudden death 346 

 192. Blushing and the effects of warmth on the skin. Effects of alcohol 



on the vascular mechanism 347 



193. The influence of exercise on the vascular mechanism . . . 349 



194. The effects of food on the vascular mechanism .... 351 



195. Relations and mutual actions of heart-beat and vaso-motor system . 351 



