1. The circulatory system consists of the following:
A - blood
B - heart
C - blood vessels
D - brain

a. A & B
b. B & C
c. A & D
d. A, B & C
2. It is the circulation where arteries and veins supply the heart with blood
a. Systematic Circulation
b. Coronary Circulation
c. Pulmonary Circulation
d. Portal Circulation
3. The blood vessels that carries deoxygenated blood to the heart
a. artery
b. capillary
c. vein
d. arteriole
4. Oxygen-rich blood comes out from the heart through
a. pulmonary artery
b. superior vena cava
c. pulmonary vein
d. aorta
5. Flaps that are located on each end of the two ventricles that prevents the backward flow of blood.
a. valves
b. Chambers
c. vessels
d. veins​