Entry of food into trachea is prevented by

Options

A. Epiglottis
B. Bicuspid valve
C. Sphincter of Oddi
D. Epimysium

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what prevents food from entering the trachea during swallowing.

2. **Identifying the Structures**: We need to consider the options provided:
- Epiglottis
- Bicuspid valve
- Sphincter of Oddi
- Epimysium

3. **Analyzing Each Option**:
- **Epiglottis**: This is a leaf-shaped piece of cartilage located at the top of the larynx. Its primary function is to act as a flap that covers the trachea during swallowing, preventing food from entering the windpipe (trachea).
- **Bicuspid Valve**: This valve is found in the heart and is not involved in the digestive system or the prevention of food entering the trachea.
- **Sphincter of Oddi**: This sphincter controls the flow of bile and pancreatic juice into the small intestine and does not relate to the trachea.
- **Epimysium**: This is a connective tissue that surrounds skeletal muscles and has no role in the digestive process or in preventing food from entering the trachea.

4. **Conclusion**: Based on the analysis, the epiglottis is the structure that prevents food from entering the trachea during swallowing. Therefore, the correct answer is **epiglottis**.

### Final Answer:
The entry of food into the trachea is prevented by the **epiglottis**.

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