1. The right auricle of the heart receives oxygenated blood.   True   False   2. During the atrial systole, the atrial muscles _______.   relax   contract   3. The cardiac veins carry blood to the walls of the heart.   True   False   4. The inferior vena cava carries blood from the upper parts of the body to the heart.   True   False   5. When the auricles of the heart contract, the ventricles relax, and vice versa.   True   False   6. The _______ of the heart pumps the blood up to the lungs only.   left auricle   right ventricle   right auricle   left ventricle   Hint Half-n-half Clue   7. With reference to the heartbeat, the word 'systole' refers to a relaxation phase whereas the word 'diastole' refers to a contraction phase.   True   False