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????? can someone help pls lol
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19 votes
????? can someone help pls lol

????? can someone help pls lol-example-1
User Anthi
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2 Answers

7 votes
D
Explanation: the blood vessel showed above has valves. Veins are the only ones that have valves.These valves prevent backflow of blood to the leg.
User Mariama
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6.5k points
6 votes

Answer:

b

Step-by-step explanation:

User CezarySzulc
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