The plants and algae around the world.from air normal
o2
CO2 and O2
Oxygen (O2) is exchanged for carbon dioxide (CO2) in the lungs. In the alveoli, tiny air sacs in the lungs, oxygen from the air is transferred into the bloodstream while carbon dioxide from the blood is released into the air to be exhaled.
Alveoli are very tiny air sacs found in the lungs where CO2 and O2 are changed.
The alveoli branch from the bronchioles and are responsible for gas exchange with the pulmonary capillaries. They come in close contanct with the capillaries so the exchange of O2 and Co2 can occur rapidly and easily.
The Diffusion is the exchange of oxygen (O2) and carbon dioxide (CO2) between the alveoli and the blood. So blood that is pumping through the capillaries in the lungs has a low concentration of O2 and a high concentration of CO2, in the alveoli it is high concentration O2 low concentration CO2. Therefore the 2 gases exchange across the alveoli membrane by diffusion trying to establish a concentration gradient.
There is more space that is occupied by H20 in the alveoli than the trachea. (BTPS - body tempertaure ,pressure saturated)
They are linked in the alveoli of the lungs where CO2 escapes from and O2 is captured by the blood.
In the alveoli
O2 would diffuse into the cells, and CO2 would diffuse into the systemic capillaries.
During Inhalation the Oxygen enters the Alveoli of the lungs . The alveoli is surrounded by very tiny Blood vessels called Capillaries . Through Diffusion The O2 Moves out of the alveoli and into the Blood . Now the Blood carries it all over to the body with the help of Hemoglobin .The Blood Passes through Tissues then the O2 diffuses into the cells due to its higher concentration in the blood .The O2 Combines with the digested food present in the cells to give out Energy . So this is how O2 moves . Hope This Helped Thanks
Gaseous exchange occurs in the alveoli (singular = alveolus) of the lungs.