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 During the Civil War (1862-1863): A Campaign; A Siege. By Michael B. Ballard. When Vicksburg fell to Union troops on July 4, 1863, the Confederacy lost its last chance to control the Mississippi River. Control of the Mississippi River during the American Civil War was an economic and psychological factor for both the North and the South.