, Physiologist. 1  In four chambered avian and mammalian hearts, the two upper chambers are known as the atria. The atria are believed to act as primer pumps which boost the end diastolic volume (the volume at the end of ventricular filling) just before contraction of the ventricles.
Disunion follows the Civil War as it unfolded. New Orleans was the jewel of the Confederacy. In addition to being the Southâs largest city, it boasted considerable industry that produced ironclads, munitions and uniforms, among other items. More important, it controlled access to the Mississippi River from the Gulf of Mexico.
It was the turning point of the war.   It is true that the Battle of New Orleans was a lopsided victory for the US however the most unusual fact was that the war was alread â¦ y over when the battle took place. The Treaty of Ghent had been signed when it happened but the combatants did not know it at the time.