What happens when the diaphragm contracts?
When the diaphragm contracts, it moves down and we breathe in (inhale).
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What is the role of the trachea in the gas exchange system?
The trachea is a tube that allows inhaled air to pass from the mouth and nose into the lungs.
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Where do the bronchi lead, and what do they further split into?
The bronchi lead to each lung and further split into smaller tubes known as bronchioles.
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What is the role of the alveoli?
The alveoli are the sites of gas exchange with the blood.
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How does oxygen enter the bloodstream during gas exchange?
Oxygen diffuses from an area of high concentration in the alveoli to an area of low concentration in the bloodstream.
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Explain three adaptations of the lungs that help in efficient gas exchange.
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