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one of the four valves that control blood flow between the heart and body

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A disorder of the hearts electrical rhythm causing the heart to beat faster and or slower

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blood vessels that carry oxygen blood away from the heart and to rest of body

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a fluid that circulates through the body and carry's oxygen, nutrients and other essential substances to cells and organs

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branching blood vessels

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organs and blood vessels that transport blook through the body

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a phase in the cardiac cycle when the heart muscle relaxes and the heart chambers fill with blood

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the innermost layer of tissue that lines the chambers and valves of the heart

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cells in the blood that transport oxygen from the lungs to the body

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the blood oxygen levels

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receives blood with O2

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pumps blood to the body

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a blood cells that helps with the immune system

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heart valve located between the left atrium and left ventricle of the heart

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the muscular tissue of the heart

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thin liquid filled sac that surround's and protects the heart

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liquid component of the blood that carries blood cells, nutrients and waste products through the body

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one way valve located at the top of the right ventricle of the heart

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receives blood without o2

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pumps blood to the lungs

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dividing wall between the heart chambers

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a phase of the heart beat when the hearts ventricles contract

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small disc shaped cells that help with blood clotting

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a door that controls blood flow from the top right chamber of the heart to the right bottom

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blood vessels that carry deoxygenated blood from the body's tissues back to the heart