1) Organs that do not belong to the circulatory System a) b) c) d) 2) The four main Components of Blood a) Plasma b) Red blood cells c) white blood cells d) Platelets e) arteries f) capillaries 3) The First step of Circulation shows that Deoxigenated blood ....  a) Enters b) the right atrium c) ventricle d) of the heart e) The left atrium 4) The largest veins in the body are.... a) The pulmonary artery b) The superior vena cava c) Aorta d) The inferior vena cava e) Pulmonary veins

Circulatory System

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