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.
On March 10, 1821, U.S. President James Monroe appointed General Andrew Jackson Commissioner of the United States to take possession of Florida and gave him the full powers of governor. Jackson accepted the office only on the condition that he could resign as soon as the territorial government was organized. On July 17, 1821, Spain transferred Florida to the United States, and Jackson sent his resignation to the president in November.