Lungs and Chest

Lungs and ChestTo live, the body must be constantly supplied with oxygen. The lungs absorb oxygen from the air, and the blood transfers it to all parts of the body. The main airway or bronchus, which leads into each lung, is divided into smaller and smaller airways called bronchioles; at the end, each bronchiole ends with clusters of air sacs – alveoli. Deoxygenated blood is pumped to the lungs through the pulmonary arteries that branch off in a similar manner. Each alveoli contains several thin-walled capillaries that allow diffusion (penetration) of oxygen and carbon dioxide from the air into the blood and vice versa.
Because of this complex structure, the lungs are especially exposed to the risk of airborne particles in the air that we breathe. Microbes, e.g. bacteria (which, among other things, cause pneumonia), inflammatory agents, such as cigarette smoke (which can cause lung cancer) and allergens (which cause asthma) may interfere with the important process of oxygen supply.