Exchange of gases between alveoli and blood in pulmonary capillaries is known as
None of the above
The correct option is A External respiration External respiration is basically the transfer of gas between respiratory organs such as lungs and the outer environment. External respiration, also known as breathing, refers to a process of inhaling oxygen from the air into the lungs and expelling carbon dioxide from the lungs to the air. In external respiration, gas exchange takes place between the alveoli and the blood.