1. Pericardium is the double-walled membranous covering that protects the heart.   True   False   2. The spleen is located behind the stomach.   True   False   3. The spleen is a lymphatic organ.   True   False   4. Blood aids in regulating the body temperature.   True   False   5. The coronary arteries originate from the base of the aorta.   True   False   6. There are four kinds of valves in the heart.   True   False   7. The aorta originates from the _______ of the heart.   right ventricle   left auricle   right auricle   left ventricle   Hint Half-n-half Clue