Carbon dioxide is harmful to the body.

____ prevents the food from entering into the glottis during swallowing.

Formation of oxyhaemoglobin is a/an ____

Which of the following diseases can be found in workers working in a mill?

Emphysema is marked by __

The amount of air inspired or expired during normal breathing is_________ ml.

Suffocation is caused due to_______

Low oxygen supply to tissues is scientifically known as ____