asked 151k views
4 votes
_____ are vessels with valves that keep blood flowing in the right direction

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User LukeLR
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8.8k points

2 Answers

6 votes
the aorta and the pulmonary artery.
answered
User Thao Ngo
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8.4k points
4 votes
Veins have valves to make sure that blood flows in only one direction.
answered
User Thykof
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8.1k points
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