INDEX. 107 



Of the capillary vessels, 155. Those which convey a colourless fluid, 

 136. Of the manner in \vhich the blood flows along these vessels, 157. 

 Terminations of the arterial systems, 159. 



Of the action of the veins, 160. Proportion of the arterial to the^ve- 

 nous blood 5 difference of arrangement and structure between the ar- 

 teries and veins, 160. Of the use of the valves of the veins, 161. Gra- 

 dual increase of velocity in the venous circulation. Of the use of the 

 vena azygos, 162. Reflux of the blood in the great venous trunks, 163. 

 Theory of the circulation, 164. Partial circulations in the midst of the 

 general circulation, 165. Of the two divisions, venous and arterial, of 

 the circle of circulation, 166. Organs situated on the two points of in- 

 tersection of this great circle, 166. 



CHAPTER IV. 



Of Respiration, 167. 



Of all the changes, which the blood undergoes, in penetrating through 

 the organs placed in the course of the circulation, the most remarkable 

 are those it receives from respiration, 167. Differences of arterial and 

 venous blood, 167. Of the atmosphere, 167. Action by which respi- 

 ration is performed, 170. Motions of the ribs, 171. Difficult respiration, 

 172. Structure of the lungs, 173. Use of the bronchial arteries, 173. 

 Pulmonary inflammations, 176. Changes on the air and on the blood by 

 respiration, 177. Vitality of the lungs, 178. Respiration of certain 

 animals, 179. Division or ligature of the eighth pair of nerves, 182. 



Of animal heat, 183. Animal heat is independent of the media in 

 which animated beings live, 183. The heat of the animal body ninety- 

 eight degrees, 184. The lungs not the only parts in which caloric is 

 disengaged, 184. Caloric evolved, to a certain degree, in all organs re- 

 ceiving arterial blood, 184. Cutaneous evaporation, the most powerful 

 means of lowering the temperature, 186. It does not explain, however, 

 why the animal temperature remains the same, in a medium hotter than 

 the body; case of a man said to be incombustible, 186. Effects of cold, 

 188. 



Phenonenon of the circulation of the blood through the lungs, 189. 

 Pulmonary exhalation, 190. Of asphyxia, from drowning and from 

 strangulation, 191. From noxious gases and from intoxication, 193. 

 From obstruction of the glottis; of the asphyxia of new born children, 

 194. 



Of several phenomena of respiration, as sighing, yawning, sneezing, 

 coughing, hiccup, and laughter, 195. Cutaneous perspiration, 196. 

 Its connexion with the other functions, 196. Its quantity, 198. Of the 

 sweat ; of the formation of carbonic acid gas on the surface of the skin, 

 200. Of the uses of the cutaneous perspiration, 200. 



CHAPTER V. 



Of the Secretions, 20 1. 



Classification of the animal fluids, 201. Chemical classification of the 

 fluids by Fourcroy, the best, 202. Of the blood. Of its physical, che- 

 mical, and vital properties, 203. Of sanguification, 204. Of the ef- 

 fects of regimen on the blood, 205. The transfusion of blood, 208. 



