Which of the following prevents the entry of food into the wind pipe?

Options

A. Glottis
B. Pharynx
C. Epiglottis
D. Both (1) & (2)

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which structure prevents food from entering the windpipe (trachea) during swallowing.

2. **Identifying the Relevant Structures**:
- The windpipe (trachea) is the passage that carries air to the lungs.
- The esophagus is the tube that carries food to the stomach.
- The glottis is the opening between the vocal cords in the larynx.
- The pharynx is the part of the throat behind the mouth and nasal cavity.

3. **Function of the Epiglottis**:
- The epiglottis is a flap-like structure located at the entrance of the larynx (the voice box).
- It acts as a switch between the trachea and the esophagus.

4. **Mechanism of Action**:
- When a person swallows, the epiglottis folds down over the larynx, preventing food from entering the windpipe.
- This action ensures that food is directed into the esophagus and not into the trachea, thus preventing choking.

5. **Conclusion**:
- Among the options provided, the epiglottis is the correct answer as it specifically prevents food from entering the windpipe.

### Final Answer:
The structure that prevents the entry of food into the windpipe is the **epiglottis**.

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