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
Barak (given name) Barak (given name) The given name Barak, also spelled Baraq, from the root "B-R-Q", is a Hebrew name meaning "lightning". It appears in the Hebrew Bible as the name of Barak ( ""), an Israelite general. It is also an Arabic name from the root "B-R-K" with the meaning of "blessed" though it is mostly in its feminine form "Baraka(h)". The Semitic root "B-R-Q" has the meaning "to shine"; "lightning". The biblical name " is given after Barak, a military commander who appears in the Book of Judges. The Arabic cognate is ' (not to be confused with ', which