Heart and along the conduction system of the heart. The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right ventricle. From here it is pumped into the pulmonary circulation, through the lungs where it receives oxygen and gives off carbon dioxide. Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation−where the oxygen is used and metabolized to carbon dioxide. The heart beats at a resting rate close to
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