which of the following statrment is TRUE?
a. As the blood leaves the lungs, the blood is saturated with about 97% oxygen.
b. As the blood leaves the heart, the blood is saturated with about 97% oxygen.
c. As the blood enters the lungs, the blood is saturated with about 97% oxygen.
d. As the blood enters the heart, the blood is saturated with about 97% oxygen​