1. The spleen is located behind the stomach.   True   False   2. The coronary arteries originate from the base of the aorta.   True   False   3. The aorta originates from the _______ of the heart.   left auricle   right ventricle   right auricle   left ventricle   Hint Half-n-half Clue   4. The auricles of the heart have thicker walls than the ventricles.   True   False   5. Pericardium is the double-walled membranous covering that protects the heart.   True   False   6. Which is the largest artery in the human body?   pulmonary artery   renal artery   hepatic artery   aorta   Half-n-half Clue   7. The spleen is a lymphatic organ.   True   False