Oxygen transportation in a human body takes place through : 1. Blood 2. Lungs 3. Tissue The correct sequence of transportation is :

In human body most of the digestive process, takes place in -

When there is a decrease in the concentration of oxygen in the blood, the rate of breathing :

The process by which blood is purified in human body is called

Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition?

In human body, the digestion of protein begins in which of the following organs?