1. During the ventricular systole, the semilunar valves are closed.   True   False   2. In a normal adult, the red blood corpuscles are produced in the liver.   True   False   3. During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.   open   closed   4. When the auricles of the heart contract, the ventricles relax, and vice versa.   True   False   5. During the ventricular systole, the blood enters the ventricles.   True   False   6. The inferior vena cava carries blood from the upper parts of the body to the heart.   True   False   7. The left auricle of the heart receives _______ blood from the lungs.   oxygenated   deoxygenated