The difference in the partial pressure of the gases in the blood coming to the lungs and the alveoli mediated the gas exchange. Without this difference we wont be able to breathe. Diaphragm in the thoracic cavity plays an important role in exchange of these respiratory gases.
Diffusion
Alveoli- these are the small sac-like structures where gas exchange occurs with the blood. Its creates an ideal site for gas exchange between the air in the lungs and the blood in the capillaries.
The partial pressures of each of the gasses, as present in the blood and in the alveoli.
Alveoli exchange Oxygen with blood in capillaries
Simply put, the gas exchange occurs in the lungs. More specifically, the blood exchange occurs at the avoli, the "air sacs" in the lungs where the surrounding capillaries can be oxygenated.
Oxygen
alveoli
alveoli
It takes place between the alveoli and the blood capillaries
air exchange takes place at the juction of blood cappileries and alveoli where the pressure of air is high in alveoli and low in blood so air from alveoli rush into blood and CO2 from blood rush in to alveoli which is then breath out
Capillaries cover the alveoli in order to maximize the area for gas exchange between the lungs and the blood. Carbon dioxide is released from the blood through the capillary walls and into the alveoli, while oxygen is picked up from the alveoli through the capillary walls and into the blood.
The lungs exchange gases with the air. The lungs will take in fresh, oxygen filled blood and circulate it throughout the body. The lungs will then expel the air, and start the process all over again.
Red blood cells are responsible for oxygen exchange