Explain with a schematic representation the exchange of gases in tissues.
Answers
Exchange of gases
Explanation:
Exchange of gases take place between the alveoli in the lungs and the blood. Alveoli have great partial pressure of oxygen and less partial pressure of CO₂ while in blood the partial pressure of CO₂ is more and partial pressure of O₂ is less. This facilitates the exchange of gas between the alveoli and the blood. The oxygen is transferred to blood and CO₂ is transferred to alveoli. The same principle is applicable for transfer of gases between blood and cells or other body tissues as well. Here the partial pressure of oxygen is more in blood and less in tissues, while the partial pressure of CO₂ is more in tissues and less in blood. So, exchange of gases takes place and tissues receive oxygen from blood and transfer CO₂ to blood. Thus, tissues receive oxygen.
Please refer to the attached picture for the diagram.