Lungs are enclosed in a membrane called;

Total chemicals in tobacco smoke are:

Which kind of blood vessels are present around the alveoli?

Amount of carbon dioxide in inspired air is:

The number of lobes in right lung is:

Main role to give out air form lungs is;

The inflammation of bronchi or bronchioles is called:

Power of speaking is only gifted to:

How many bronchi are there in the air passageway?

No. of bronchi in the air passage way are:

How many carciogens are present in cigarette smoke?

A disease involving the breakdown of air sacs of the lungs is:

The process of gaseous exchange

Most of the gaseous exchange in a leaf occurs through:

Where does the gaseous exchange occur in humans?

Which structure actively helps in taking the air out of lungs?

The primary chemical stimulus for breathing is the concentration of;

Point out the FALSE statement about respiration.

Which process does not occur in the nasal cavity?

In which of the following gaseous occur in stomata?

In humans and other higher the exchange of gases is carried out by:

The length of trachea is:

C-shaped cartilagenous rings are present in the wall;

How many pairs of ribs are there in humans?

How many lobes are present in right lung?