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.
One of the two upper receiving chambers of the heart. The left atrium receives pulmonary venous blood (oxygenated, from the lungs) and the right atrium receives systemic venous blood (partly deoxygenated, from the rest of the body). atria pl, atrial adj. See Figure 1. Figure 1: The nervous system.