Atrium (heart) similar function. Some animals (amphibians and reptiles) have a three-chambered heart, in which the blood from each atrium is mixed in the single ventricle before being pumped to the aorta. In these animals, the left atrium still serves the purpose of collecting blood from the pulmonary veins. In some fish, the circulatory system is very simple: a two-chambered heart including one atrium and one ventricle. Among sharks, the heart consists of four chambers arranged serially (and therefore called a serial heart): blood flows into the most posterior chamber, the sinus venosus, and then to the atrium which moves it to
Matthew (given name) United Kingdom, Matthew has been among the 10 most popular male names. Matthew has been in the top 1,000 most popular male names in Australia, Canada and United States. 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