CONTENTS 



11 



PROBLEM 



XX. Digestion and Absorption . 



184. To compare the digestive system of a frog with that of man 



185. To study my own teeth . .... 



186. To demonstrate the function and structure of a simple gland 



To find the use of digestion 



To determine the conditions most favorable for gastric digestion 

 To determine another effect of gastric juice .... 

 To note the action of pancreatic juice on starch .... 

 To note the effect of pancreatic juice on oils and fats 



192. To study the effect of artificial pancreatic juice on protein 



193. To find one action of bile ... .... 



To study the method and place of absorption in the human body 



To understand the structure of a villus 



How may foods be absorbed by the villi ? 



To find the pathway of absorbed foods .... 



187. 

 188. 

 189. 

 190. 

 191. 



194. 



195. 

 196. 

 197. 



198. 

 199.^ 

 200." 

 201. 

 202. 

 203. 

 204. 

 205. 

 206. 



207. 

 208. 

 209. 

 210. 

 211. 

 212. 



PAGR 



220 



221 

 222 

 223 

 224 

 224 

 225 

 225 

 225 

 220' 

 226 

 227 

 227 

 227 

 228 



XXI. The Blood and its Circulation . . 232 



To prove that blood contains nutrients 232 



To study the corpuscles of the blood 233 



To determine the effect of oxygen and carbon dioxide upon the blood 234 



To study the structure of the heart ... ... 235 



To study the circulation of the blood 236 



To determine the rate of your own heartbeat . ... 237 



What is the effect of hard mental work on the pulse beat ? 237 



What effect has exercise on the heartbeat ? 237 



How to stop the flow of blood in case of an accident . 238 



XXII. Eespikation and Excretion 

 To compare the structures of the lungs of the frog and of man 



To determine changes that talie place in air in the lungs 



To find the capacity of the lungs .... 



To study the mechanics of respiration 



To study the part the ribs play in respiration 



What is the function of the diaphragm ? . . , 



213. To find out what becomes of the oxygen in the lungs 



214. To make a study of ventilation .... 



215. To study air for presence of dust (Home experiment) 



216. To determine the best method of cleaning a room 



217. What makes a crowded, closed room uncomfortable ? 



218. To study the structure of the kidney .... 



219. The skin as an organ of excretion and heat control 



XXIII. Body Control and Habit Formation 



220. How are vfe aware of the world about us ? 



240 

 211 

 241 

 242 

 242 

 243 

 243 

 244 

 244 

 245 

 245 

 246 

 246 

 247 



251 

 251 



