Question

inhaled oxygen 20.96% exhaled oxygen 16.4 why us the content of oxygen decreased​

Answer 1

Answer:

as we inhale the oxygen it goes into the lungs where it is used to oxygenate the blood which contains carbon dioxide or rather say the deoxygenated blood the oxygen passes through the alveoli and it reaches the tissues which needs oxygen to the blood the carbon dioxide released by the tissues is then carried back to the lungs to be exhaled from our body

Explanation:

now all the oxygen that is carried by the blood to the tissues cannot be used only some portions of the oxygen is used an arrest is again exam held as a result the content of oxygen is decreased