, 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.
What was the significance of the Battle of New Orleans during the US Civil War? The Battle of New Orleans was a major Union victory and Confederate  loss. The Union was able to cut off this important port city,  depriving the Confederacy of supplies to â¦a certain extent. Making the world better, one answer at a time.