During one circuit of blood from lungs to the tissues and back through circulatory system the percentage of haemoglobin giving up oxygen is
A. 50%
B. 25%
C. 75%
D. 100%
Answer:B
During one circuit of blood from lungs to the tissues and back through circulatory system the percentage of haemoglobin giving up oxygen is
A. 50% B. 25% C. 75% D. 100%