1. In a normal adult, the red blood corpuscles are produced in the liver.   True   False   2. During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.   closed   open   3. During the ventricular systole, the semilunar valves are closed.   True   False   4. The _______ of the heart pumps the blood up to the lungs only.   right auricle   left auricle   right ventricle   left ventricle   Hint Half-n-half Clue   5. When the auricles of the heart contract, the ventricles relax, and vice versa.   True   False   6. The cardiac veins carry blood to the walls of the heart.   True   False   7. The process of circulation of blood in the heart begins with the _______ of the auricles of the heart.   contraction   relaxation