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4 votes
A flap of tissue that prevents blood from flowing back is a(n)________ .

User Simon Xu
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7.4k points

2 Answers

3 votes

Answer:

It is a valve.

Step-by-step explanation:

Took the test and got it right

User LMG
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8.5k points
7 votes
a valve is a flap of tissue that prevents blood from flowing back
User A Srinivas
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