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wrote...
Posts: 105
Rep: 8 0
A week ago
Heart valves serve what purpose?

• They prevent backflow of blood.

• They control the heart's electrical signals.

• They prevent blood from flowing forward.

• They prevent oxygenated blood from flowing through the coronary arteries.
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EKG Plain and Simple
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wrote...
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A week ago
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They prevent backflow of blood.
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wrote...
A week ago
Exactly what I needed for my project, TYSM
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