The Respiratory and Circulatory System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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What makes up the main organs of the respiratory system? | lungs
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What path does the oxygen take to reach the lungs? | It goes from the nose or mouth through the trachea to the lungs.
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What is the job of the circulatory system? | to take blood to all parts of the body
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Which part of the circulatory system pumps blood to all body parts? | the heart
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Why doesn't blood leaving the heart mix with blood entering the heart? | Blood leaves through the heart through arteries and returns to the heart through veins.
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What makes blood follow a one-way path through the heart? | Valves allow flow in only one direction.
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Why is it easy for gases to pass between air sacs and blood? | Air sacs have very thin walls.
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Which blood vessels take blood away from the heart? | arteries
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Which blood vessels in the lungs help your body take in and give off gases? | capillaries
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What do you think would happen if blood entering the heart mixed with blood leaving the heart? | Blood carrying oxygen would mix with blood carrying carbon dioxide. The body might not get all the oxygen it needed.
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Which is a waste product of cells? | carbon dioxide
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lungs | main organ of the respiratory system
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capillaries | tiny blood vessels that allows gases and nutrients to pass from blood to cells
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heart | The muscle that pumps the blood through blood vessels to all parts of the body.
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arteries | Blood vessels that carry blood away from the heart.
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veins | Large blood vessels that return blood to the heart.
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Created by:
doris.gaddis
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