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Arteries and veins are connected by capillaries

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Arterioles and venues

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Capillaries need for gaseous exchange

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Veins have valves

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Different lumen sizes

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Small hole in the middle - veins have bigger hole

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Arteries under more pressure

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A for arteries a for away

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Arteries have a thick wall

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Capillaries small

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Arteries carry oxygenated blood as they come from the heart

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Veins carry deoxygenated blood

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capillaries one cell thick

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arteries away

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Veins go to the heart