obsolete_cardiac atrium true MESH:D006325 true heart atrium James Malone EMAPA:16688 MFO:0080900 EV:0100018 http://purl.obolibrary.org/obo/UBERON_0002081 ZFA0000471 Use http://purl.obolibrary.org/obo/UBERON_0002081 Label: cardiac atrium EHDAA:1265 In the heart, the atrium is an upper chamber found on both sides of the heart. The left atrium receives red, oxygenated blood from the lungs by way of the pulmonary veins. The right atrium receives dark red blood from the other parts of the body. General anatomical term which refers to a chamber or cavity to which are connected one or more chambers or passageways. Examples: right atrium of heart, atrium of middle nasal meatus, atrium of tympanic cavity, atrium of alveolus. MA:0000073 2.38 MAT:0000496 FMA:85574 TAO:0000471 heart atria The paired upper chambers of the heart. The left atrium receives oxygenated blood from the pulmonary vein and pumps blood into the left ventricle. The right atrium receives venous deoxygenated blood from the entire body via the superior and inferior vena cavae and pumps blood into the right ventricle. atrial tissue Most anterior stretch of the embryonic/larval foregut. Its posterior boundary, where the pharynx starts is immediately posterior to the openings of the salivary gland ducts. One of four heart chambers. BTO:0000903