A thin long tube extending posteriorly and passing through neck, thorax and a diaphragm and leading to stomach is called -

Options

A. Pharynx
B. Trachea
C. Oesophagus
D. Larynx

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure**: The question describes a thin long tube that extends posteriorly through the neck, thorax, and diaphragm, leading to the stomach.

2. **Identifying the Pathway**: The food travels from the mouth to the pharynx. In the pharynx, there are two pathways: one leads to the trachea (windpipe) and the other to the esophagus (food pipe).

3. **Function of the Tube**: The tube in question is responsible for transporting food from the pharynx to the stomach.

4. **Recognizing the Tube**: The tube that fits this description is the esophagus, which is approximately 25 cm long and facilitates the movement of the bolus (chewed food) through peristalsis (muscular contractions).

5. **Conclusion**: Therefore, the thin long tube that extends through the neck, thorax, and diaphragm, leading to the stomach is called the esophagus.

**Final Answer**: The tube is called the esophagus.

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