Biology

What "trapdoor" on your windpipe helps keep out food particles?

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Which digestive organ sends the broken-down nutrients out to the body?
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What are the parts of a living creature's system called?
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What is another name for an ant cow?
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Which of these changes the most from beginning to the adult stage of its life cycle?
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Which of these is a part of blood?
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Which of the following animals might a heron eat?
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What is the upper surface of the plant leaf called?
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What color is a polar bear's skin?
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