Free Vision Screenings for Infants and Toddlers. The early years of life from birth until age five are crucial for a childâs visual development and eye health. The American Optometric Association recognizes how important it is to get your baby's vision off to a good start.
atrium(Noun) An upper chamber of the heart that receives blood from the veins and forces it into a ventricle. In higher vertebrates, the right atrium receives blood from the superior vena cava and inferior vena cava, and the left atrium receives blood from the left and right pulmonary veins.
Atrium (noun) the main part of either auricle of the heart as distinct from the auricular appendix. Also, the whole articular portion of the heart. Atrium (noun) a cavity in ascidians into which the intestine and generative ducts open, and which also receives the water from the gills. See Ascidioidea. Origin: [L., the fore court of a Roman house.]