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respiration and excretion

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
about 1/5 of the air you breathe is..   oxygen  
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the exchange of carbon dioxide for oxygen takes place in the   air sacs  
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red blood cells flow back to the heart through..   veins  
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when your cells use oxygen to break down sugar, the result is...   energy  
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When it's hot out, the body excretes water through...   your breath  
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most of the carbon dioxide produced by the body cells is carried away by the liquid part of the blood called..   plasma  
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the body gets rid of excess water through..(three answers)   skin, kidneys, lungs  
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the process of breathing in ...   inhale  
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What is one way the body maintains a normal body temperature   excretes water  
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the red blood cells carry...   oxygen  
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about how many times a day do the kidneys clean the blood..   about 40 times  
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what part of the respiratory system prepares the air for your lungs   nose  
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nutrients are carried in the blood by the...   plasma  
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a gas produced by the cells as they work..   carbon dioxide  
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after giving up their oxygen, what color are red blood cells returning to the heart   purplish  
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mucus is produced by the...   lining of the nose  
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name the group of organs that get rid of cell waste such as nitrogen   excretory system  
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what organs filter nitrogen waste from the blood   kidneys  
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how does carbon dioxide get from your body cells into the air around you   first, it passes from the cells back into the blood. the red blood cells carry the waste back to the heart through the veins  
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Created by: ddolan
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