1. The aorta originates from the _______ of the heart.   left auricle   right ventricle   right auricle   left ventricle   Hint Half-n-half Clue   2. A portal vein begins in the form of capillaries and ends in the form of capillaries too.   True   False   3. Which of the following is not a function of the spleen?   Spleen produces red blood corpuscles.   Spleen produces lymphocytes.   Spleen produces blood platelets.   Spleen stores blood.   Half-n-half Clue   4. The spleen is located behind the stomach.   True   False   5. The pulse rate decreases during strenuous physical work.   True   False   6. The auricles of the heart have thicker walls than the ventricles.   True   False   7. The word 'pulse' is related to veins.   True   False