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.
By the summer of 1863, Union advances from the Memphis in the North and New Orleans in the South had constricted Confederate control of the Mississippi River to a small section stretching from Port Hudson, Louisiana to the fortified city of Vicksburg, Mississippi.he Confederate army marched into Vicksburg on May 17, 1863, with Grantâs Federals hot on their heels. Seeing an opportunity to strike while his opponent was disorganized, Grant ordered a small-scale assault on three axes, the Graveyard Road, the Jackson Road, and the Southern Railroad on May 19.