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
June (given name) June (given name) June is a female given name, but it is also used as a male given name in English-speaking countries. It comes from the name of the month, which is derived from Juno, the name of a Roman goddess. It is also a short form of the names Juniper, Junia, Junius and Junior. June was a very popular girl's name and somewhat popular boy's name in the early to mid 20th century in the United States. As a girl's name, it reached a peak in 1925 as the 39th most popular name, but then gradually declined until it