1. Pericardium is the double-walled membranous covering that protects the heart.   True   False   2. The coronary arteries originate from the base of the aorta.   True   False   3. The aorta originates from the _______ of the heart.   right auricle   left auricle   right ventricle   left ventricle   Hint Half-n-half Clue   4. Which of the following is not a function of the spleen?   Spleen produces blood platelets.   Spleen stores blood.   Spleen produces lymphocytes.   Spleen produces red blood corpuscles.   Half-n-half Clue   5. The spleen is located behind the stomach.   True   False   6. The auricles of the heart have thicker walls than the ventricles.   True   False   7. There are four kinds of valves in the heart.   True   False