Arrange the steps in the heart’s action as it pumps blood by writing 1 (being the first) – 8 (being the last)

______ Oxygen-rich blood enters the left atrium from the lungs.
______ Blood from the right ventricle goes to the lungs to pick up oxygen. ______ At the same time, oxygen-poor blood enters the right atrium.
______ Blood is squeezed into the ventricles.
______ The ventricles contract.
______ The heart muscle relaxes.
______ At the same time, blood from the left ventricle goes to the body to
supply it with oxygen. ______ The heart muscle contracts.