The tube which joins pharynx with the middle ear possesses

Options

A. Hyaline cartilage
B. Bone
C. Elastic cartilage
D. Fibrocartilage

Answer

**Step-by-Step Solution:**

1. **Identify the Tube**: The tube that connects the pharynx to the middle ear is known as the Eustachian tube. This is the primary focus of the question.

2. **Understand the Function**: The Eustachian tube plays a crucial role in equalizing air pressure on both sides of the eardrum, which is essential for proper hearing.

3. **Composition of the Eustachian Tube**: The Eustachian tube is primarily composed of elastic cartilage. This type of cartilage is flexible and allows the tube to open and close as needed.

4. **Reason for Elastic Cartilage**: The presence of elastic fibers in the Eustachian tube is important because it needs to contract and relax during activities such as swallowing or yawning. This flexibility helps maintain the function of the tube.

5. **Conclusion**: Therefore, the correct answer to the question is that the Eustachian tube possesses elastic cartilage.