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Mars2501 [29]
3 years ago
12

Which of the following is true of valves in veins?

Biology
1 answer:
MAVERICK [17]3 years ago
8 0

Answer:

A

Explanation:

they are associated with venous sinuses.this valve open one way flow of direction of the heart.

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cell membrane

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When visiting Hawaii on vacation, a tourist notices that there are many different species of birds that look similar to one anot
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The correct answer is option D.

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