Topic: Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders· Human Physiology
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to :
1. benign growth on mucous lining of nasal cavity.
2. inflammation of bronchi and bronchioles.
3. proliferation of fibrous tissues and damage of the alveolar walls.
4. reduction in the secretion of surfactants by pneumocytes.