Coordinated contractions of cardiac muscle cells in the heart propel blood out of the atria and ventricles to the blood vessels of the left/body/systemic and right/lungs/pulmonary circulatory systems.This complex mechanism illustrates systole of the heart.oordinated contractions of cardiac muscle cells in the heart propel blood out of the atria and ventricles to the blood vessels of the left/body/systemic and right/lungs/pulmonary circulatory systems.
The Union army was intent on gaining control of the Mississippi River in order to divide the Confederacy and weaken its economy. Taking control of the Mississippi prevente â¦ d the western Confederate states of Arkansas, Texas, and Louisiana from providing men and material for the Confederate army.
Vicksburg was the last remaining Confederate stronghold on the Mississippi. When it finally fell, the Union controlled the whole of the Mississippi and was able to cut the Confederacy in half. The city of Vicksburg didn't celebrate the Fourth of July for some 80 years after wards. Ronald D Â· 10 years ago.