1. The inferior vena cava carries blood from the upper parts of the body to the heart.   True   False   2. During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.   open   closed   3. The _______ of the heart pumps the blood up to the lungs only.   left auricle   left ventricle   right ventricle   right auricle   Hint Half-n-half Clue   4. Which fluid fills up the space between all human body cells?   intercellular fluid   extracellular fluid   intracellular fluid   extercellular fluid   Half-n-half Clue   5. During the ventricular systole, the blood enters the ventricles.   True   False   6. Plasma is a constituent of blood.   True   False   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