Noemi2000 Noemi2000

03-02-2017
Health

contestada

Discuss two instances where valves are important in the circulatory system

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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

04-02-2017

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

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