gaseous exchange in alveoli to capillaries
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HEY DEAR.....
HERE IA UR ANS....
GASEOUS EXCHANGE IN ALVEOLI TO CAPILLARIES DONE THROUGH TGE PROCESS CALLED DIFFUSION....
The primary function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli. The layers of cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other. This barrier between air and blood averages about 1 micron (1/10,000 of a centimeter, or 0.000039 inch) in thickness. Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the Heart, which pumps the blood to the rest of the body (see Biology of the Heart : Function of the Heart). Oxygen-deficient, carbon Dioxide-rich blood returns to the right side of the heart through two large veins, the superior vena cava and the inferior vena cava. Then the blood is pumped through the pulmonary artery to blood CAPILLARIES....!!!
Hope it hlps uh....!!
Have a good day dear...!!
HERE IA UR ANS....
GASEOUS EXCHANGE IN ALVEOLI TO CAPILLARIES DONE THROUGH TGE PROCESS CALLED DIFFUSION....
The primary function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli. The layers of cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other. This barrier between air and blood averages about 1 micron (1/10,000 of a centimeter, or 0.000039 inch) in thickness. Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
Oxygenated blood travels from the lungs through the pulmonary veins and into the left side of the Heart, which pumps the blood to the rest of the body (see Biology of the Heart : Function of the Heart). Oxygen-deficient, carbon Dioxide-rich blood returns to the right side of the heart through two large veins, the superior vena cava and the inferior vena cava. Then the blood is pumped through the pulmonary artery to blood CAPILLARIES....!!!
Hope it hlps uh....!!
Have a good day dear...!!
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1. The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them.
2. Gaseous exchange occurs between alveoli and capillaries through Diffusion.
3. The exchange of oxygen and carbon dioxide takes due to the difference in their concentrations.
4. When the blood surrounding the alveoli has a lower concentration in oxygen than alveolar air, oxygen moves into the capillaries.
5. When the blood has a higher concentration of carbon dioxide than in the alveoli, it moves into the lungs from where it is exhaled.
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