Our respiratory system functions as we inhale oxygen which leads to a surge in chest and the diaphragm moves downward creating suction. This suction pushes the inhaled oxygen into the upper and lower respiratory passages. When we exhale, the lungs and chest are restored to their original position and the air is further evacuated from the lungs through the respiratory passages. There are certain diseases associated with respiratory system such as asthma, bronchitis, pulmonary emphysema.
In Asthma, the air passage of the patient becomes inflamed and narrow which produces excessive mucus and causes extreme difficulty in breathing. The airways are also affected by external allergens such as dust, pollution, pollen grains in air etc. In case of Bronchitis, bronchial lining is inflamed causing constant coughing, breathing difficulty and excessive mucus production. Pulmonary emphysema is another chronic disease caused by over inflation of the air sacs present in the lungs.
Respiratory problems can be controlled by staying away from, dust pollen grains and other allergens.