question_answer

The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen to the tissues, because

A)  The tissue can absorb \[{{O}_{2}}\]from oxyhaemoglobin.

B) \[{{O}_{2}}\] concentration in tissues is lower and \[C{{O}_{2}}\]concentration is higher as compared to lungs.

C) \[{{O}_{2}}\]concentration in tissues is higher and \[C{{O}_{2}}\]concentration is lower as compared to lungs.

D)  Oxyhaemoglobin undergoes reduction.