At which level of thoracic vertebra, trachea divides

Options

A. `2^(nd)` thoracic vertebra
B. `5^(th)` thoracic vertebra
C. `3^(rd)` thoracic vertebra
D. `4^(th)` thoracic vertebra

Answer

To determine the level of the thoracic vertebra at which the trachea divides, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The trachea, also known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi, which lead to the lungs.

2. **Understand the Anatomy**: The trachea is made up of cartilage and serves as a passage for air. It is important to note that the trachea does not collapse due to the cartilaginous structure.

3. **Locate the Thoracic Vertebrae**: The thoracic vertebrae are part of the spinal column and are situated between the cervical (neck) and lumbar (lower back) regions.

4. **Determine the Division Point**: The trachea divides into the right and left primary bronchi at a specific level of the thoracic vertebrae.

5. **Identify the Correct Vertebra**: The trachea divides at the level of the **5th thoracic vertebra (T5)**.

### Conclusion:
The trachea divides into the primary bronchi at the level of the 5th thoracic vertebra (T5).

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