Breathing and exchange of gases class 11

  • 6 years ago
breathing and exchange of gases
Human respiratory system
Exchange of gases in lungs: It is also called external respiration. In this gaseous exchange oxygen passes from alveoli to pulmonary capillary blood and CO2. ... The blood reaching the tissue capillaries has PO2 higher than that in the tissue cells and PCO2 lower than that in the tissue cells.