1. The right auricle of the heart receives oxygenated blood.   True   False   2. During the atrial systole, the atrial muscles _______.   contract   relax   3. The inferior vena cava carries blood from the upper parts of the body to the heart.   True   False   4. The cardiac veins carry blood to the walls of the heart.   True   False   5. The left auricle of the heart receives _______ blood from the lungs.   oxygenated   deoxygenated   6. With reference to the heartbeat, the word 'systole' refers to a relaxation phase whereas the word 'diastole' refers to a contraction phase.   True   False   7. Which fluid fills up the space between all human body cells?   intracellular fluid   intercellular fluid   extercellular fluid   extracellular fluid   Hint Half-n-half Clue