What do you mean by expand?—"To increase in size."
How is the air expelled from the lungs?—"The chest contracts and sends the impure air through the tubes and windpipe, the nose and mouth, into the atmosphere."
What do you mean by contracts?—"Becomes smaller."
What do you mean by atmosphere?—"The air."
Of what use is the air when it is in the lungs?—"It makes the blood pure."
Why can you not live without breathing?—"Because, if I do not breathe, pure air cannot get into the lungs to make the bad blood pure, and I cannot live if the dark, impure blood is sent back again through my body."
Why must you live in the sunlight?—"Because the sunlight helps to purify the blood and strengthen the body."
Why must you wear loose clothing?—"Because tight clothing stops the circulation of the blood."
Why must you avoid tight-lacing?—"Because tight-lacing crowds the ribs against the lungs, so that the lungs cannot move freely."
Why should you wear clean clothing?—"That nothing impure may pass into the body through the pores of the skin."