1. The spleen is a lymphatic organ.   True   False   2. Which is the largest artery in the human body?   pulmonary artery   aorta   renal artery   hepatic artery   Hint Half-n-half Clue   3. Which of the following is not a function of the spleen?   Spleen stores blood.   Spleen produces red blood corpuscles.   Spleen produces blood platelets.   Spleen produces lymphocytes.   Half-n-half Clue   4. Blood aids in regulating the body temperature.   True   False   5. 'Systolic pressure' is the term that indicates the lower limit of blood pressure.   True   False   6. There are four kinds of valves in the heart.   True   False   7. Blood pressure is exerted by the blood flowing through the veins on the walls of the veins.   True   False