The cilia of the trachea transfer:

Select the correct statements about alveoli from the following.
$i$. Air sac of each terminal bronchiole shows $10$ to $12$ alveoli.
$ii$. Each alveolus is surrounded by a network of capillaries.
$iii$. They are lined by ciliated pseudostratified epithelium.
$iv$. They provide surface area for exchange of gases.
$v$. There are about $700$ million alveoli in the lungs.

Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing food. This coughing is due to the improper movement of:

Diaphragm is a dome-shaped muscular structure which separates

Which of the following sequences is correct for the human respiratory system?

What is the correct pathway of air during respiration?