ANATOMY & PHYSIOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site atrium Either of the two (right and left) upper chambers of the heart. The left atrium receives oxygenated blood from the pulmonary veins; the right atrium receives deoxygenated blood from the venae cavae. See also ventricle. Related entry    • atrial septal defect Related category    • ANATOMY AND PHYSIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP