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
Kelsey (given name) in 1996. It was the 528th most common name for women in the United States in the 1990 census. Kelsey was ranked among the top 100 names for girls born in Scotland in 2007. It was also among the top 100 names for girls born in England and Wales in the late 1990s. People with the given name Kelsey: Kelsey (given name) Kelsey Is a unisex given name of English origin. The name most probably derives from an Old English given name "Ceolsige", which meant "ship's victory", or it could be a place name meaning "Cenel's island". "Cenel's Island" is