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heart, blood, blood vessels three parts of cardiovascular system transportation function of the cardiovascular system pericardium a loose fitting membrane that surrounds and protects the heart 4 total chambers of the heart atria upper chambers ventricles lower chambers diastole heart at rest systole heart at work pumping blood away from arteries carry blood ________ the heart toward veins carry blood ________ the heart the only fluid tissue unique fact about blood arterioles smaller arteries aorta largest artery vena cava largest vein transportation (lots of hemoglobin to carry oxygen) job of red blood cells (erythrocytes) prevent blood loss by clotting job of the platelets (thrombocytes) combat toxic microbes when enter body, fight cancer job of white blood cells plasma helps distrtibute heat, doesnt contain red blood cells, liquid portion of blood, transport cells that make up tissues protect against disease (allows cells to meet at lymph nodes, so no organs get over run) and transports facts to blood job of lymphatic system major organs in lymphatic system spleen, thymus, tonsils, peyers patches blood pressure (hypertension) most common form of heart disease, amount of resistance heart has to pump against 120/80 normal blood pressure 140/90 or higher high blood pressure heart disease #1 killer in america