1. Blood aids in regulating the body temperature.   True   False   2. Which is the largest artery in the human body?   pulmonary artery   aorta   hepatic artery   renal artery   Hint Half-n-half Clue   3. The spleen is a lymphatic organ.   True   False   4. The pulse rate decreases during strenuous physical work.   True   False   5. Pericardium is the double-walled membranous covering that protects the heart.   True   False   6. A portal vein begins in the form of capillaries and ends in the form of capillaries too.   True   False   7. Blood pressure is exerted by the blood flowing through the veins on the walls of the veins.   True   False