By definition, veins are
A. vessels that carry blood toward the heart.
B. vessels that always carry nutrient-poor blood.
C. the only vessels that lead from capillaries.
D. vessels that carry oxygen-poor blood.
Answer:A
By definition, veins are
A. vessels that carry blood toward the heart. B. vessels that always carry nutrient-poor blood. C. the only vessels that lead from capillaries. D. vessels that carry oxygen-poor blood.