This system includes the nose, back of the throat, and the tubes down into both lungs.
At the top of the tube is which closes during the process of swallowing to prevent. From entering the lungs. Air is drawn through the nose where the fine pieces of dust are taken out of the air by the little hairs which lines both sides of the nose. That is why, if one has been in a dark place, we find that the nose contains a lot of death that has been claimed from the air by these head. Also, during its passage through the nose, the air is much things as it passes over the foods of the nose. In this way the air is clean and moist and not likely to cause damage to the lungs. If his mouth instead of his nose, he is much more likely to develop lung problem
HOW THE AIR IS TAKEN IN
The purified air now passes into the lungs on both sides of the chest. This expand into millions of tiny parts, like a sponge. In these little bags, oxygen is taken out of the air to enrich the blood carbon dioxide which is them brief out true the together with any other gaseous poison which the body wants to get rid of that if you do not sit upright works with me, not breathe deeply, only a small part of your lungs work. Thus the body is cheated of the full amount of vital oxygen which it should have.
Furthermore any germs or harmful substances present in the unused part of the lungs, and not disturb and thus may continue and cause lung disease
WHERE NOT STAY
If you continue sit in dusty rooms, you’re lung become diseased. They cannot perform the function that is normally required of them. Many poisons, such as with home fires, all the exhaust pipes of cars, all the smoke of cigarettes may be absorbed into the body through the system. These poisons are harmful and can eventually lead to death.