Answer:
The two body organ systems involved in gas exchange are the respiratory and circulatory systems, and the membrane transport used for the exchange is the diffusion.
Explanation:
The respiratory system is responsible for introducing oxygen-charged air, which passes to the pulmonary alveoli where gas exchange occurs. The blood that travels through the circulatory system carries oxygen (O₂) or carbon dioxide (CO₂), which is coupled to the hemoglobin found in the erythrocytes.
The alveolus-capillary membrane is the anatomical site where gas exchange occurs, a process where oxygen from the inspired air passes into the blood and carbon dioxide from cellular metabolism passes into the alveolus to be eliminated on expiration.
The mechanism of gas exchange in the capillary alveolus membrane depends on a gas concentration gradient, given by the difference in the partial pressures (Pa) as PaO₂ and PaCO₂ at a given time.
Diffusion then occurs from the place where there is a high partial gas pressure to another place where the partial pressure is lower, i.e. O₂ from the alveolus to the blood and CO₂ from the blood to the alaveolus.
