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circulatory system - Coggle Diagram
circulatory system
heart
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to be able to pump, the walls have to be made of muscle.
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vessels
Veins: transport blood BACK into the heart. thin wall,large lumen, thin muscle. HAS A VALVE
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Arteries: trasport blood AWAY of the heart. thick wall, small lumen,thick muscle.
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blood
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plasma: transport nutrients,hormones,proteins,minerals,etc.
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