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1. Arteries

2. Capillaries

3. Veins

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1. Tricuspid valve

2. Pulmonary valve

3. Bicuspid (mitral) valve

4. Aortic valve

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1. Right atrium

2. Right ventricle

3. Left atrium

4. Left ventricle

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1. Interatrial septum

2. Interventricular septum

3. Epicardium

4. Myocardium

5. Endocardium

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Superior vena cava

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Inferior vena cava

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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 arteries

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Lungs (gas exchange)

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Pulmonary veins

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Left atrium

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Bicuspid (mitral) valve

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Left ventricle

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Aortic valve

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Aorta

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Arteries of all over the body

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Capillaries

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Veins