See the below table . Write what you know from it .

Explanation

(1)The inhaled air consists of 21% of oxygen whereas the exhaled air contains 16% of oxygen only. This is due to utlilisation of oxygen during cellular respiration in the body. Hence the difference occurs .
(2)Inhaled air contains 0.03% of carbon dioxide whereas exhale air contains 4.4% of carbondioxide . The concentration of `CO_2` is increased a lot due to the release of `CO_2` during cellular respiration in the body.
(3)Both inhale and exhale air contains 78% of nitrogen because nitrogen has no role to play in cellular respiration.