Which of the following statements is correct about the human circulatory system?
a) The right side of the heart pumps oxygenated blood to the body's tissues.
b) The main function of white blood cells is to carry oxygen.
c) Arteries carry blood away from the heart.
d) Veins carry oxygen-rich blood to the heart.
1
a and b
2
b and c
3
a, b, and c
4
c only