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| Functions of the respiratory system |
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Definition
| Supply the body's cells with oxygen, remove carbon dioxide, help maintain blood pH |
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| Exchange of gases between the air and blood - occurs in the alveoli |
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| Exchange of gases between the blood and the body's cells - usually occurs in the capillaries |
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| The mechanical movement of air into and out of your lungs |
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| To warm and moisten air, filter out impurities like dust, pollen |
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| Flap of tissue that moves down to cover the trachea when you swallow food so that food does not enter your lungs, but goes down the esophagus instead |
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| Tube that enters the lung. The trachea branches into two tubes, one for each lung |
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| Smaller, branching air tubes inside the lungs |
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| Small clusters of air sacs inside the lungs - look like grape clusters. Site of gas exchange between the air and the blood |
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| Largest organ of the respiratory system; site of gas exchange, filled with millions of alveoli |
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| Large muscle under the lungs, it action allows us to breath |
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| Diaphragm contracts, chest rises, chest volume increases, air pressure drops, air rushes into the lungs |
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| Diaphragm relaxes, chest drops, chest volume decreases, air pressure increases, air rushes out |
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| Constant internal conditions - this system helps maintain it by removing waste - carbon dioxide - from the body and delivering oxygen to the body; it helps maintain constant blood pH |
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