$A$ pair of small lymphatic tissue present at the sides of the root of the tongue is called as:

To which part does the bronchial artery supply blood?

The lungs contain a large number of narrow tubes known as:

Select the $INCORRECT$ statement.

The epithelium of the alveoli in the lungs is .......... .

The figure shows a diagrammatic view of the human respiratory system with labels $A, B, C$,and $D$. Select the option which gives the correct identification and main function and/or characteristic.