The blood leaving the lungs has all its haemoglobin present in oxygenated form and gives up oxygen to the tissues, because
A. the tissues can absorb oxygen from oxyhaemoglobin
B. oxygen concentration in tissues is higher and carbon dioxide concentration lower than in the lungs
C. oxyhaemoglobin undergoes reduction
D. oxygen concentration in tissues is lower than carbon dioxide concentration higher than in the lungs
Answer:D
The blood leaving the lungs has all its haemoglobin present in oxygenated form and gives up oxygen to the tissues, because
A. the tissues can absorb oxygen from oxyhaemoglobin B. oxygen concentration in tissues is higher and carbon dioxide concentration lower than in the lungs C. oxyhaemoglobin undergoes reduction D. oxygen concentration in tissues is lower than carbon dioxide concentration higher than in the lungs