. The Ontario public school hygiene . n other vvaj-s than inenabling us to smell. It warms, moistens, and cleansesthe inspired air. For example, when we are travellingin dusty cars, the nose stops much dust from passingdown the throat and into the lungs. It gathers in a ringat the entrance to the nostrils. The same thing may benoticed in men who have been working close to athrashing-machine or who have been shovelling coal. The nose stops also many of the invisible germs ofdisease from passing down the throat. In fact, the noseis more useful to us in this silent work of keeping outdust and dis
. The Ontario public school hygiene . n other vvaj-s than inenabling us to smell. It warms, moistens, and cleansesthe inspired air. For example, when we are travellingin dusty cars, the nose stops much dust from passingdown the throat and into the lungs. It gathers in a ringat the entrance to the nostrils. The same thing may benoticed in men who have been working close to athrashing-machine or who have been shovelling coal. The nose stops also many of the invisible germs ofdisease from passing down the throat. In fact, the noseis more useful to us in this silent work of keeping outdust and disease germs than it is as the organ of smell. When you open your mouth and by means of amirror look toward the back of it, you see your there is another passage into the throat besides theone from the mouth. The two nostrils join each other 70 PUBLIC SCHOOL HYGIENE about one and a half inches from the tip of the nose, andopen by one passage into the throat behind. The largechambers just inside of each nostril are for use in. Figure 29.—Front to back section through the nose, mouth, throat, wind-pipe andgullet. 1, the uvula ; 2, the epiglottis which covers the opening into the wind-pipe ; 3, an opening in the bone ; 4, an opening in the forehead bone ; 5, the backpart of the mouth; 6, the upper part of the throat, into which the nose passagesopen. smelling; the passages backward into the throat arefor breathing. Lying under the skin which lines the inside of thenose, mouth, and throat, are a large number of small THE NOSE AND THROAT 71 organs somewhat like sweat-glands. In these glandsjuices are forming all the time. When in a healthycondition, the juices kill the disease germs whichmay happen to enter the nose along with the when there are no disease germs to kill, thejuices catch the dust and germs, and pass them outat the mouth or nose. It is very important that there should be a free andopen passage for the air from the front opening of thenose right ba
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Keywords: ., bookcentury1900, bookdec, booksubjectchildren, booksubjecthygiene
