CONTENTS. Vll 



PAGE 



PECULIARITIES OP THE CIRCULATION IN DIFFERENT PARTS .... 167 



Circulation in the Brain 167 



Circulation in the Erectile Structures . 168 



Agents concerned in the Circulation 170 



Discovery of the Circulation 170 



Proofs of the Circulation of the Blood 171 



CHAPTER VI. 



RESPIRATION . . . . . 172 



Position and Structure of the Lungs 173 



Structure of the Trachea and Bronchial Tubes 176 



Structure of Lobules of the Lungs . . 178 



Mechanism of Respiration .......... 183 



Respiratory Movements .......... 183 



Respiratory Rhythm 188 



Respiratory Sounds . . . . . . . . . . . 188 



Respiratory Movements of Glottis 188 



Quantity of Air Respired 189 



Vital or Respiratory Capacity 190 



Force exerted in Respiration 191 



Circulation of Blood in the Respiratory Organs 191 



Changes of the Air in Respiration 192 



Changes produced in the Blood by Respiration 198 



Mechanism of various Respiratory Actions 198 



Influence of the Nervous System in Respiration 201 



Effects of Vitiated Air Ventilation 204 



Effect of Respiration on the Circulation . . . . . . . 205 



Apnoea Dyspnoea Asphyxia 209 



CHAPTER VII. 



FOODS 212 



Classification of Foods 213 



Foods containing chiefly Nitrogenous Bodies 214 



Carbohydrate Bodies 216 



Fatty Bodies 217 



Substances supplying the Salts 217 



Liquid Foods 217 



Effects of Cooking 217 



Effects of an Insufficient Diet 218 



Starvation 219 



Effects of Improper Food 221 



Effects of too much Food 222 



Evict Scale 223 



CHAPTER VIII. 



DIGESTION 224 



PASSAGE OF FOOD THROUGH THE ALIMENTARY CANAL 224 



Mastication 224 



Insalivation .... 22G 



