How is oxygen and carbon dioxide transported in human beings?

Explanation

1. Transport of oxygen . It is transported from respiratory organs to body cells .
(i) Haemoglobin helps in the transport of oxygen. In the alveoli of the lungs , the haemoglobin oxygen. In the alveoli of the lungs , the haemoglobin (Hb) present in red blood corpuscles combines with oxygen to form oxyhaemoglobin . When the blood reaches the tissue , oxygen is released from the oxyhaemoglobin for the consumption by the tissues .
`Hb + O_(2) to HbO_2`
(ii) Some of `O_2` is transported in the solution form by plasma of blood.
2. Transport of `CO_2` .
1 `CO_(2)` diffuses into blood plasma to form physical solution .
2. `CO_2` forms unstable carbonic acid with water and is transported as such .
3 `CO_(2)` is also transported from tissue to lungs as bicarbonates.