JARVIS'S PRACTICAL PHYSIOLOGY. 407 



CHAPTER IV. 



238 What materials of the body are obtained from the blood? 



239. What elementary substances are found in the blood ? 



240. Are all these elements found in every texture of the body ? 



241. At what stage is the blood changed to flesh? 



242. Which makes the largest demand on the blood, growth or 

 change of particles? 



243. How are the new atoms of flesh disposed of? 



244. What is the office of absorbents ? 



245. Give Dr. Johnson's description. 



CHAPTER V. 



246. Do the particles that compose our bodies remain the same ? 



247. How can the atoms change, without a change of the body? 

 Illustrate. 



248. What experiments have been tried on pigs? What result? 



249. How is this fact explained? 



250. During what part of life is the work of the arteries and absor- 

 bents equal ? 



251. When does nutrition predominate? When absorption ? 



252. What is the effect of all exercise on nutrition and absorption? 



253. What law is a physical one, as well as moral ? 



254. How may the relative activity of destruction and creation be 

 disturbed ? 



255. How are wens and other fleshy tumours produced ? How scat- 

 tered ? 



CHAPTER VI. 



256. Is the work of nutrition and absorption equally rapid at all pe- 

 riods ? 



257. Whose flesh is ever young ? Whose ever old $ 



258. Where does our knowledge of nutrition end? 



259. What elements do the nutritive organs select to form fat? hair T 

 muscle ? 



260. Do the nutritive organs ever misplace a particle ? 



261. How does arterial blood differ from venous? 



262. By what means is the venous blood renovated ? 



PAKT III. 

 RESPIRATION. 



CHAPTER I. 



263. How are the wasted particles of the body d.ispo-ed of? 



264. Of what parts does the venous blood consist? Why would not 

 these nourish the body ? To what process must they be submitted 1 



