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| the muscular pump that circulates blood through the heart, the lungs (pulmonary circulation), and the rest of the body (systemic circulation) |
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| branching system of vessels that transports blood from the right and left ventricles of the heart to all body parts; transports blood away from the heart |
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| vessels that transport blood from peripheral tissues back to the heart |
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| microscopic blood vessels that connect arterioles with venules; facilitate passage of life-sustaining fluids containing oxygen and nutrients to cell bodies and the removal of accumulated waste and CO2 |
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| fluid consisting of formal elements (erythrocytes, thrombocytes, leukocytes) and plasma; specialized body fluid that delivers necessary substances to the body's cells (O2, foods, salts, hormones) and transports waste products (CO2, uria, lactic acid) away from those same cells |
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