Question

About action of gases in lungs

Answer 1

Answer:

The primary function of the respiratory system is to take in oxygen and eliminate 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.

Answer 2

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Question

About action of gases in lungs?

Answer

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◇The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax).

◇The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi.

◇The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.

◇During gas exchange oxygen moves from the lungs to the bloodstream.

◇At the same time carbon dioxide passes from the blood to the lungs.

◇This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

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