Why does the food bolus not enter into the wind pipe during swallowing?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Anatomy**: The human throat contains two main passages: the esophagus (food pipe) and the trachea (windpipe). The esophagus carries food to the stomach, while the trachea carries air to the lungs.

2. **Role of the Epiglottis**: The epiglottis is a small, leaf-shaped flap of cartilage located at the base of the tongue. Its primary function is to prevent food and liquids from entering the trachea during swallowing.

3. **Swallowing Mechanism**: When a person swallows, the muscles in the throat contract to push the food bolus down. As this happens, the epiglottis folds down over the opening of the trachea.

...