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Vinil7 [7]
2 years ago
14

______ are structures that allow for one-way blood flow through the heart.

Biology
2 answers:
Eva8 [605]2 years ago
9 0
Valves are structures that allow for one-way blood flow through the heart.
Grace [21]2 years ago
4 0
The answer is valves. Valves exist all throughout the cardiovascular system, but are especially important in the heart. 
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