Exchange Of Gases

Concentration or partial pressure of is in alveolar air and in expired air.

Outermost Layer Of pulmonary alveolitis alveolar epithelium while that of blood capillaries is endothelium. Thus, both alveolar epithelium and endothelium of blood capillaries separate air in pulmonary alveoli from blood capillaries

contains a protein portion called globin and a pigment portion called haem. The haem portion consists of four atoms of iron, each capable of combining with a molecule of . Thus, one carries molecules of .

Asthma is a respiratory disorder. It is caused by allergic reactions due to pollen etc. It results in spasm of bronchial muscles and thus the patient experiences shortness of breath and thus difficulty in breathing. The characteristic feature that helps is diagnosis is production of wheezing sound