Atrium (heart) of blood occurs. In birds, mammals, and some other reptiles (alligators in particular) the partitioning of both chambers is complete. Atrium (heart) The atrium is the upper chamber in which blood enters the heart. There are two atria in the human heart – the left atrium connected to the lungs, and the right atrium connected to the venous circulation. The atria receive blood, and when the heart muscle contracts they pump blood to the ventricles. All animals with a closed circulatory system have at least one atrium/auricle (humans have two atria). The atrium used to be called the "auricle", and
For We Are Many For We Are Many For We Are Many (sometimes written as …For We Are Many) is the fifth studio album by the heavy metal band All That Remains. Released on October 12, 2010, it is the third album by the band to be produced by the Killswitch Engage guitarist, Adam Dutkiewicz, who also produced "This Darkened Heart" and "The Fall of Ideals". "For We Are Many" is the first All That Remains album to contain the same line-up as the preceding album, a tradition that would continue up through 2015's "The Order of Things". On August 18, 2010, the band