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1. Arteries: Carry blood away from heart

2. Veins: Bring blood back to heart

3. Capillaries: Microscopic vessels where gas exchange occurs

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1. Tricuspid Valve: Between right Atrium and right Ventricle

2. Pulmonary Valve: Between right Ventricle and Pulmonary Artery

3. Mitral Valve: Between left Atrium and left Ventricle

4. Aortic Valve: Between left Ventricle and the Aorta

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1. Right Atrium: Receives blood from the body

2. Right Ventricle: Delivers blood to the lungs

3. Left Atrium: Receives blood from the lungs

4. Left Ventricle: Delivers blood to the body

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A: Heart Walls

1. Interatrail Septum: Separates the two upper chambers (Atria)

2. Interventricular Septum: Separates the two lower chambers (Ventricles)

B: Layers of the Heart:

1. Endocardium: Innermost lining of the heart walls

2. Myocardium: Middle (muscular) layer

3. Pericardium: Membranous sac surrounding heart

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Superior & 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 Artery

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Left Atrium

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Mitral Valve

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Left Ventricle

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Lungs

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Pulmonary Vein

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Aortic Valve

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Aorta

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Arteries throughout the body

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Capillaries

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Veins