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krok68 [10]
3 years ago
15

What structure prevents blood from flowing backward in the heart?

Health
2 answers:
erastova [34]3 years ago
3 0

Answer:

chicken

Explanation:

wing

DENIUS [597]3 years ago
3 0

Explanation:

<h3>Tricuspid valve.</h3>

That's the answer. Pls mark me brainliest

God Bless

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