408 QUESTIONS ON 



265, 266. How are the lungs situated and protected? 

 267. Describe the spine. 268. Breast- bone. 269. Ribs. 270. Their 

 position. 



CHAPTER II. 



271. What provision for moving the ribs ? 



272. What motion of the ribs expands the chest? 



273. 274. What is the diaphragm, and its office in respiration ? 

 275. Describe the process of inspiration. 276. Of expiration. 



277. Explain fig. VI. 



CHAPTER III. 



278. What is the relative position of the heart and lungs? What 

 the substance of the lungs 1 



279. Describe the air-tubes; the blood-vessels of the lungs'? 



280. What is the windpipe ? 



281. What is the organ of voice ? Its diseases? 



282. How is the windpipe divided? What are the air-cell^? 



283. How are the air-vessels lined ? What is coughing ? 

 '284. How may sensibility be impaired? 



285. How are the rnirrute arteries separated from the air-cells? 



286, 287. What two operations constitute respiration? 

 288. Name the organs employed in respiration. 



CHAPTER IV 



289. What elements of waste matter are separated from the blood? 

 How ? 



290. Into what does carbon enter and compose a part? 



291. What are the constituents of the atmosphere? 



292. What is oxygen, and what are its combinations? 



293. What is nitrogen and some of its combinations? 



294. What new compounds are formed in the lungs? 



295. What is carbonic acid ? Where found ? Its properties ? 



296. 297. What interchange takes place between the air and blood ? 



CHAPTER V. 



298. In what state does the blood enter the lungs? In what state 

 does it leave them ? 



299. Why do the veins, and the flushed cheek differ in color? 



300. What is the effect of respiring the same air several times? 

 Haw much does our respiration change it? 



301. Give Davy's experiment. 



302. What is the point of saturation ? 



303. How may it be shown that water comes from the lungs? 



304. What other matters are carried off by the lungs f 



