asked 21.6k views
0 votes
What structure prevents blood from flowing backward in the heart?

atrium

ventricle

valve

vessel

2 Answers

4 votes

Answer:

valve

Step-by-step explanation:

edge

answered
User Erlkoenig
by
7.9k points
6 votes

Answer:

its valve

Step-by-step explanation:

answered
User Taras
by
8.7k points
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