Arteries, carry oxygen-rich blood from your heart to your body’s tissues. The exception is your pulmonary arteries, which go to your lungs., Veins, carry oxygen-poor blood back to your heart., Capillaries, are small blood vessels where your body exchanges oxygen-rich and oxygen-poor blood., Left coronary artery, divides into two branches (the circumflex artery and the left anterior descending artery)., Aortic valve, opens when blood flows out of your left ventricle to your aorta (artery that carries oxygen-rich blood to your body)., Pulmonary valve, opens when blood flows from your right ventricle to your.

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