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A cartilaginous flap called prevents the...

A cartilaginous flap called _____prevents the entry of food into the ____, opening of the wind pipe-during_____.

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**Step-by-Step Solution:** 1. **Identify the Cartilaginous Flap**: The question asks for a cartilaginous flap that prevents food from entering a specific area. The flap that serves this purpose is the **epiglottis**. 2. **Determine the Area Prevented from Entry**: The epiglottis prevents food from entering the **trachea** (the windpipe), which leads to the lungs. 3. **Identify the Context**: The epiglottis functions during the act of **swallowing**. When food is swallowed, the epiglottis closes over the trachea to prevent food from entering the lungs. 4. **Combine the Answers**: Putting it all together, we can fill in the blanks in the original question: A cartilaginous flap called **epiglottis** prevents the entry of food into the **trachea**, opening of the windpipe during **swallowing**. **Final Answer**: A cartilaginous flap called **epiglottis** prevents the entry of food into the **trachea**, opening of the windpipe during **swallowing**. ---
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