Which membrane covers the lungs and provides protection?

Which of the following is incorrect regarding the conducting part of the respiratory system?

'$XX$' is a part of the respiratory system that contains $C$-shaped rings of hyaline cartilage. '$XX$' is lined with ciliated,pseudostratified columnar epithelium. Identify '$XX$'.

It prevents the entry of food into the larynx.

Which of the following organs is not a part of the abdominal cavity?

Food does not normally enter the trachea because during swallowing of food