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.
Mississippi joined the Union as the 20th state in 1817 and gets its name from the Mississippi River, which forms its western border. Early inhabitants of the area that became Mississippi included the Choctaw, Natchez and Chickasaw. Spanish explorers arrived in the region in 1540 but it was the French who established the first permanent settlement in present-day Mississippi in 1699.