1. 'Systolic pressure' is the term that indicates the lower limit of blood pressure.   True   False   2. Pericardium is the double-walled membranous covering that protects the heart.   True   False   3. The pulse rate decreases during strenuous physical work.   True   False   4. Which is the largest artery in the human body?   aorta   pulmonary artery   renal artery   hepatic artery   Hint Half-n-half Clue   5. The coronary arteries originate from the base of the aorta.   True   False   6. Blood aids in regulating the body temperature.   True   False   7. The auricles of the heart have thicker walls than the ventricles.   True   False