Distinguish between:
(ii) Inspired air and expired air.

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Solution

Inspired air Expired air

The air that is taken inside the body through the nostrils during inhalation is called the inspired air. The air that is given out from the lungs during the process of exhalation is called the expired air.

The inspired air is rich in oxygen. The expired air is rich in carbon dioxide.

The temperature of the inspired air is variable. The temperature of the expired air is the same as that of the body, i.e. $37^{\circ} C$ .

It contains less water vapour. It contains more water vapour.

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Inspired air	Expired air
The air that is taken inside the body through the nostrils during inhalation is called the inspired air.	The air that is given out from the lungs during the process of exhalation is called the expired air.
The inspired air is rich in oxygen.	The expired air is rich in carbon dioxide.
The temperature of the inspired air is variable.	The temperature of the expired air is the same as that of the body, i.e. $37^{\circ} C$ .
It contains less water vapour.	It contains more water vapour.