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

Answer

To answer the question, we need to fill in the blanks with the correct terms based on the information provided in the video transcript.

1. **Identify the cartilaginous flap**: The question states that a cartilaginous flap prevents the entry of food. From the transcript, we learn that this flap is called the **epiglottis**.

2. **Identify what the flap prevents food from entering**: The transcript mentions that the epiglottis prevents food from entering the **larynx**, which is also referred to as the **glottis**. This is the opening of the windpipe.

3. **Identify the action during which this prevention occurs**: The transcript indicates that this prevention happens during the act of **swallowing**. When we swallow, the epiglottis closes off the larynx to ensure that food goes down the esophagus instead of entering the windpipe.

Putting it all together, we can fill in the blanks:

A cartilaginous flap called **epiglottis** prevents the entry of food into the **glottis**, opening of the windpipe during **swallowing**.

### Final Answer:
A cartilaginous flap called **epiglottis** prevents the entry of food into the **glottis**, opening of the windpipe during **swallowing**.