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
Ingrid (given name) but picked up again in the late 1970s, peaking above 1.5% in the 1990s. The name became popular outside of Scandinavia from the 1940s due to the fame of Ingrid Bergman. Ingrid (given name) Ingrid is a Scandinavian, German, and Dutch feminine given name. It continues the Old Norse name "Ingiríðr", which was a short form of "Ingfríðr", composed of the theonym "Ing" and the element "fríðr" "beloved; beautiful" common in Germanic feminine given names. The name Ingrid (more rarely in the variant "Ingerid" or "Ingfrid"; short forms "Inga, Inger, Ingri") remains widely given in all of Scandinavia, with the