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
Which? to own Which? Ltd and retains its own name. Following the deregulation of the gas and electricity industry, "Which?" launched a free online energy comparison service called "Switch with Which?" in 2005, to compare energy tariffs. The service was awarded Energywatch Confidence Code accreditation in 2006. In the 2010 Superbrands index, "Which?" ranked fifth in the "Media — Newspapers and Magazines" category and 256th overall. "Which?" carries out systematic testing of consumer products and financial services, the results of which are published in reports in "Which? magazine" and on the "Which?" website. Tests are carried out on goods, services, and