Question

explain exchange of gases in human being

Answer 1

The gases are exchanged in the lungs. The lungs have small and tiny chambers called alveoli which play a vital role in the exchange of gases. The alveolar air consists mainly and mostly of oxygen whereas the blood coming to the alveoli consists mainly of carbon dioxide. After several metabolic activities in the body the oxygen is used up and carbon dioxide is remained in the blood cells. The oxygen present in the alveolar air gets diffused into the blood and the carbon dioxide in the blood is diffused into the alveoli. Then the oxygen is sent with the blood and the CO2 is sent out of the body.

Answer 2

• The gases are exchanged in the lungs.

• The lungs have small and tiny chambers called alveoli which play a vital role in the exchange of gases.
• The alveolar air consists mainly and mostly of oxygen whereas the blood coming to the alveoli consists mainly of carbon dioxide.
• After several metabolic activities in the body the oxygen is used up and carbon dioxide is remained in the blood cells.
• The oxygen present in the alveolar air gets diffused into the blood and the carbon dioxide in the blood is diffused into the alveoli.
• Then the oxygen is sent with the blood and the CO2 is sent out of the body.

How does exchange of gases take place in human body?

• The oxygen present in the breathed air enters the blood present in blood vessels and carbon dioxide present in the blood goes out into the alveoli.
• Thus, exchange of gases takes place in the air once it reaches the lungs.

How does exchange of gases take place in the alveoli?

• Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them.
• As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Why is gas exchange important?

• Gas exchange is the process by which oxygen and carbon dioxide move between the bloodstream and the lungs.
• This is the primary function of the respiratory system.
• It is essential to ensure a constant supply of oxygen to tissues, as well as removing carbon dioxide to prevent its accumulation.

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