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
Matthew (given name) Matthew (given name) Matthew is an English language given name. It ultimately derives from the Hebrew name "מתתיהו" ("Matityahu") which means "Gift of Yahweh". The Hebrew name "" (Matityahu) was transliterated into Greek to "Ματταθίας" ("Mattathias"). It was subsequently shortened to Greek "Ματθαῖος" ("Matthaios"); this was Latinised as "Matthaeus", which became "Matthew" in English. The popularity of the name is due to Matthew the Apostle who in Christian theology is one of the twelve apostles of Jesus and the author of the Gospel of Matthew. Maiú and Maidiú are Gaelic forms of the name Matthew, and were brought to Ireland