, 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.
The South, the War and âChristian Slaveryâ. In the minds of many Southerners, the capture of New Orleans on April 25, 1862, by Union forces was more than simply a troubling military loss.It also raised the disturbing possibility that divine punishment was being inflicted on a spiritually wayward and sinful Confederacy.isunion follows the Civil War as it unfolded. The loss of the Southâs most important port and largest city had followed on the heels of the loss of Tennesseeâs Fort Henry and Fort Donelson in February and the ignominious retreat from Shiloh in early April.