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Noemi2000
Noemi2000 Noemi2000
  • 03-02-2017
  • Health
Answered

Discuss two instances where valves are important in the circulatory system

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Samarion889
Samarion889 Samarion889
  • 03-02-2017

It deals with the heart blood and how the lungs fill the cells with oxygen for blood

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allyfontela
allyfontela allyfontela
  • 03-02-2017

They delegate the four chambers of the heard , and open correctly so that blood can successfully flow out

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