13
7
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8
2
9
3
10
11
12
Sebastien Aubry - SierraEchoBravo.com
"used"
deoxygenated
blood to
the lungs
"fresh"
oxygenated
blood to
the body
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"used"
deoxygenated
blood from
the body
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systole stage
4
diastole stage
5
"fresh"
oxygenated
blood from
the lungs
6
1