1. The right auricle of the heart receives oxygenated blood.   True   False   2. When the auricles of the heart contract, the ventricles relax, and vice versa.   True   False   3. During the atrial systole, the openings of the pulmonary vein and the vena cava are _______.   closed   open   4. During the atrial systole, the atrial muscles _______.   contract   relax   5. Plasma is a constituent of blood.   True   False   6. The inferior vena cava carries blood from the upper parts of the body to the heart.   True   False   7. In a normal adult, the red blood corpuscles are produced in the liver.   True   False