Multiple choice

Which among the following statements regarding the trachea in human beings is INCORRECT?

  1. The oesophagus lies anteriorly to the trachea.

  2. A flap-like epiglottis closes the opening to the larynx during swallowing.

  3. The cricoid cartilage is the only complete ring of cartilage in the trachea.

  4. The trachea is lined with pseudostratified columnar epithelium.

  5. There are fifteen to twenty incomplete C-shaped tracheal rings of cartilage.
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A Correct answer
Explanation

The oesophagus lies posteriorly to the trachea. Circular bands of fibrous connective tissue called the annular ligaments of trachea join the tracheal rings together.

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