The structure which prevents the entry of food into the respiratory tract is

Diaphragm is a dome-shaped muscular structure which separates

The given figure shows the human respiratory system with structures labeled $A, B, C,$ and $D$. Which of the following options correctly identifies the structure and its main function or characteristic?

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

Number of alveoli in the human lungs has been estimated to be approximately

Pleural membrane is the covering of