Veins generally carry deoxygenated blood.
Deoxygenated blood is heavy with carbon dioxide.
Veins carry blood that's heavy with carbon dioxide.
What does blood in the veins have a lot of?
Options:
(A) Carbon dioxide
(B) Carbon monoxide
(C) h2o
(D) Energy.
(E) Air
(F) kinetic energy
(G) Decibels
(H) Chemical energy