Blood and circulation: the walls of the atria are thin and so they can be stretched to receive blood as it returns to the heart but can contract with enough force to to push blood through the bicuspid and tricuspid valves into the ventricles.

Question

the walls of the atria are thin and so they can be stretched to receive blood as it returns to the heart but can contract with enough force to to push blood through the bicuspid and tricuspid valves into the ventricles.

Memorable Condor · Accepted Answer

The structure of the heart is adapted( elastic atria)

Blood and circulation

The walls of the atria are thin and so they can be stretched to receive blood as it returns to the heart but can contract with enough force to to push blood through the bicuspid and tricuspid valves into the ventricles.

The structure of the heart is adapted( elastic atria)

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