Pick your answer from: (a). hair. (b). lungs. (c). mucus. (d). matter. (e). ovaries. (f). veins. (g). bones. (h). skin.
Q: Fact 1: Oxygen is just one substance transported by the blood. Fact 2: Blood is transported through our veins. Given the two facts above, oxygen is just one substance transported through our what?
A:
(f).