1. With reference to the heartbeat, the word 'systole' refers to a relaxation phase whereas the word 'diastole' refers to a contraction phase.   True   False   2. The right auricle of the heart receives oxygenated blood.   True   False   3. During the ventricular systole, the blood enters the ventricles.   True   False   4. During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.   closed   open   5. Plasma is a constituent of blood.   True   False   6. During the ventricular systole, the semilunar valves are closed.   True   False   7. Which fluid fills up the space between all human body cells?   intercellular fluid   intracellular fluid   extracellular fluid   extercellular fluid   Hint Half-n-half Clue