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Arteries

Veins

Capillaries

Arterioles

Venules

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Tricuspid

Bicuspid

Pulmonary semilunar

Aortic semilunar

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Right atrium

Right ventricle

Left atrium

Left ventricle

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Interventricular septum

Interatrial septum

Endocardium

Myocardium

Epicardium

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Blood enters the right atrium

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Tricuspid valve

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Right ventricle

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Pulmonary valve

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Pulmonary artery

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Left atrium

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Lungs

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Pulmonary veins

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Bicuspid valve

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Left ventricle

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Aortic valve

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Aorta

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Capillaries, Veins, back to the Vena cava