Which are the main parts of the pharynx?

Choose the correct sentences for the conducting part of the respiratory system.
$(I)$ Transports the atmospheric air to the alveoli.
$(II)$ Clears it from foreign particles.
$(III)$ Humidifies the air.
$(IV)$ Brings the air to body temperature.

Vocal cords occur in

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.

What are the membranes covering the lungs called?

Pleural membrane is the covering of