Biology, 12.10.2019 11:30 caroline1484
The atrioventricular (av valves are closed while the atria are contracting when the ventricles are in diastole by the movement of blood from atria to ventricles when the ventricles are in systole
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Actual age your first developed of age well comparison age refers to absolute age true or false
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Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.
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