CONTEXTS 



11 



PROBLEM 



XX. Digestion and Ahsoimtmin . 



184. To compare the digestive system of a frog with that <»f iiiai 



185. To study my own teeth 



186. To demonstrate the function and structure of a simple j;land 



187. To find the use of digestion 



188. To determine the conditions most favorable fur ga.siric digestion 



189. To determine another effect of gastric juice 

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

 lUl. To note the effect of pancreatic juice on oils and fats 



192. To study the effect of artificial pancreatic juice on i^rotein 



193. To find one action of bile 



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



195. To understand the structure of a villus 



196. How may foods be absorbed by the villi ? . 



197. To find the pathway of absorbed foods 



XXI. The Blood and its Circulation 



198. To prove that blood contains nutrients 



199. To study the corpuscles of the blood .... 



200. To determine the effect of oxygen and carbon dioxido upon tlu- 



201. To study the structure of the heart .... 



202. To study the circulation of the blood .... 



203. To determine the rate of your own heartbeat 



204. What is the effect of hard mental work on the pulse beat '.' 



205. What effect has exercise on the heartbeat ? 



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



XXII. Respiration and Excretion 



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



208. To determine changes that take place in air in the lungs 



209. To find the capacity of the lungs .... 



210. To study the mechanics of respiration 



211. To study the part the ribs play in respiration 



212. 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 du.st (Home experiment) 

 210. 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 IIauit Formation 



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



220 



221 

 222 

 223 

 •JJ \ 

 224 

 225 

 225 

 225 

 22r, 



226 



blood 



228 



232 



232 



2:W 

 2:^4 



235 

 2:}6 

 237 

 237 

 237 

 238 



240 



211 

 241 

 242 

 242 

 213 

 243 

 244 

 244 

 245 

 245 

 246 

 24«» 



251 

 251 



