Oxygenated blood is carried to the heart from the lungs in the pulmonary vein - It goes through the left atrium - Then it goes through the Bicuspid valve - Then it goes through the left ventricle , which pumps the blood through the semilunar valve - the blood the goes through the aorta and around the body (L. PV. LA. BV. LV. SV. A. B - Lawyers.Pets.Are.Buying.Very.Salty.Apple.Bars.)
