Which of the following prevent collapsing of trachea?

Options

A. Muscles
B. Diaphragm
C. Ribs
D. Cartilaginous rings.

Answer

To answer the question "Which of the following prevent collapsing of trachea?", let's break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Structure of the Trachea**:
- The trachea, also known as the windpipe, is a tubular structure that connects the larynx to the bronchi, allowing air to pass into the lungs.

2. **Function of the Trachea**:
- The primary function of the trachea is to conduct air to and from the lungs during the process of breathing. It must remain open to facilitate this airflow.

3. **Composition of the Trachea**:
- The walls of the trachea are supported by incomplete rings of cartilage. These rings are made of hyaline cartilage, which is a flexible type of cartilage.

4. **Role of Cartilage Rings**:
- The incomplete rings of cartilage provide structural support to the trachea. They prevent the trachea from collapsing, especially when there is no air inside it. This is crucial because the trachea needs to maintain its shape to ensure that air can flow freely in and out of the lungs.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the **incomplete rings made up of hyaline cartilage** prevent the collapsing of the trachea.

### Final Answer:
The structure that prevents the collapsing of the trachea is **incomplete rings of hyaline cartilage**.

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