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
Isla (given name) Isla (given name) Isla ( ) is a feminine given name traditionally of primarily Scottish usage, derived from "Islay", which is the name of an island off the west coast of Scotland. It is also the name of two Scottish rivers. In 2016, it was both the fourth most popular name for baby girls born in Scotland and the fourth most popular name for girls born in England and Wales. It was among the top 10 names given to girls born on the Isle of Man in 2009 and one of the top five names for girls born in Guernsey