What blood vessel is the site of exchange of oygen and carbon dioxide between the lungs and blood cells?
Question
What blood vessel is the site of exchange of oxygen and carbon dioxide between the lungs and blood cells?
Solution
The blood vessel that is the site of exchange of oxygen and carbon dioxide between the lungs and blood cells is the capillary. Here's a step-by-step explanation:
- Oxygen-rich air is inhaled into the lungs.
- This air travels down the bronchial tubes and into the alveoli, which are tiny air sacs in the lungs.
- The walls of the alveoli are surrounded by a network of tiny blood vessels called capillaries.
- Oxygen from the air in the alveoli diffuses across the thin walls of the alveoli and into the blood in the capillaries.
- At the same time, carbon dioxide, a waste product from the body's cells, diffuses from the blood in the capillaries and into the alveoli.
- The carbon dioxide is then exhaled from the lungs, and the oxygen in the blood is carried to the body's cells to be used for energy.
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