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There are 3 types of circulation. Coronary, Pulmonary, and Systematic. What do each of them do?
Coronary: arteries and veins supply the HEART with blood
Pulmonary: pulmonary artery carries de-oxygenated BLOOD TO LUNGS to release CO2 and pulmonary vein carries oxygenated blood FROM LUNGS back to the heart
Systemic: arteries bring oxygenated BLOOD TO BODY CELLS and veins return de-oxygenated blood back to heart
(key is coronary = heart, pulmonary = lung, systematic = body)