Which of the following is most suitable description for trachea?
(a) Straight tube, extending upto the mid-thoracic cavity and divides at the level of 5th thoracic vertebra.
(b) Straight tube, extending upto the mid-thoracic cavity and divides at the level of 3rd thoracic vertebra.
(c) Straight tube, extending upto the neck and divides at the level of 5th cervical vertebra
(d) Curved tube, extending upto the mid-thoracic cavity and divides at the level of 5th thoracic vertebra.

Options

A. Straight tube, extending upto the mid-thoracic cavity and divides at the level of `5^(th)` thoracic vertebra.
B. Straight tube, extending upto the mid-thoracic cavity and divides at the level of `3^(rd)` thoracic vertebra.
C. Straight tube, extending upto the neck and divides at the level of `5^(th)` cervical vertebra
D. Curved tube, extending upto the mid-thoracic cavity and divides at the level of `5^(th)` thoracic vertebra.

Answer

To solve the question regarding the most suitable description of the trachea, let's analyze each option step by step:

1. **Understanding the Trachea**:
- The trachea is a straight tube that connects the larynx to the bronchi. It is an essential part of the respiratory system.

2. **Analyzing the Options**:
- **Option (a)**: "Straight tube, extending up to the mid-thoracic cavity and divides at the level of 5th thoracic vertebra."
- This statement is accurate. The trachea does extend to the mid-thoracic cavity and divides at the level of the 5th thoracic vertebra into the primary bronchi.

- **Option (b)**: "Straight tube, extending up to the mid-thoracic cavity and divides at the level of 3rd thoracic vertebra."
- This statement is incorrect. The trachea does not divide at the 3rd thoracic vertebra; it divides at the 5th thoracic vertebra.

- **Option (c)**: "Straight tube, extending up to the neck and divides at the level of 5th cervical vertebra."
- This statement is also incorrect. While the trachea does extend into the neck, it does not divide at the cervical vertebrae; it divides at the thoracic vertebrae.

- **Option (d)**: "Curved tube, extending up to the mid-thoracic cavity and divides at the level of 5th thoracic vertebra."
- This statement is incorrect because the trachea is not a curved tube; it is a straight tube.

3. **Conclusion**:
- After analyzing all the options, the most suitable description for the trachea is **Option (a)**: "Straight tube, extending up to the mid-thoracic cavity and divides at the level of 5th thoracic vertebra."