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HOME >> BIOLOGY >> DICTIONARY. In modern architecture, an atrium (plural atria) is a large open space, often several stories high and having a glazed roof and/or large windows, often situated within an office building and usually located immediately beyond... Atrium (architecture), a large open space within a building.
The heart pumps oxygenated blood to the body and deoxygenated blood to the lungs. Learning Objective. Key Points. In the human heart there is one atrium and one ventricle each for systemic and pulmonary circulation, with four chambers in total: left atrium, left ventricle, right atrium, and right ventricle .