Atrium (heart) now used for an appendage of the atrium. Humans have a four-chambered heart consisting of the right atrium, left atrium, right ventricle, and left ventricle. The atria are the two upper chambers. The right atrium receives and holds deoxygenated blood from the superior vena cava, inferior vena cava, anterior cardiac veins and smallest cardiac veins and the coronary sinus, which it then sends down to the right ventricle (through the tricuspid valve) which in turn sends it to the pulmonary artery for pulmonary circulation. The left atrium receives the oxygenated blood from the left and right pulmonary veins, which it
Arabella (given name) Arabella (given name) Arabella is a female given name of Scottish origin. The earliest known namesake: Arabella de Leuchars (c.1135-1203): was a granddaughter of the Scottish king William the Lion; the earliest English namesake was the granddaughter of Arabella de Leuchars: Arabella de Quincy (c.1186-1258), the daughter of Saer de Quincy, 1st Earl of Winchester. Typically of medieval bearers of the name both these Arabellas are also documented as Orabel[la] and Orabilia, and in documents which Latinize names as Orabilis. A Latin construction which suffixes "orare" with "ābilis" - thus interpretable as "given to prayer" or "entreatable" - Orabilis has