At which level of vertebrae of the vertebral column trachea divides and forms bronchus ?

Options

A. `4^(th)` thorsic vertebrae
B. `5^(th)` thorasic vertebrae
C. `7^(th)` thorasic vertebrae
D. `3^(rd)` thorasic vertebrae

Answer

To determine the level of the vertebrae at which the trachea divides to form the bronchi, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**: The trachea is a tube that carries air to the lungs and divides into two primary bronchi (one for each lung).

2. **Identify the Vertebral Levels**: The vertebral column is divided into different regions: cervical, thoracic, lumbar, sacral, and coccygeal. The thoracic region contains the thoracic vertebrae (T1 to T12).

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

4. **Determine the Specific Vertebra**: The trachea typically divides at the level of the fifth thoracic vertebra (T5).

5. **Name the Division Point**: The point where the trachea bifurcates into the bronchi is known as the "carina."

6. **Conclude the Answer**: Therefore, the trachea divides and forms the bronchi at the level of T5.

### Final Answer:
The trachea divides and forms the bronchi at the level of the **fifth thoracic vertebra (T5)**.

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