The papillary muscle.
The partition between the sides of the heart is called the septum.
Mitrial valve
It collects blood and transfers it to the left ventricle, where blood is pumped to the rest of the body.
The valve present between the left auricle and the left ventricle is the mitral valve, also known as the bicuspid valve. It consists of two flaps that open and close to regulate blood flow from the left atrium to the left ventricle and prevent backflow of blood.
The right artium and ventricle receives blood from the tissues. The left atrium and ventricle receives blood from the lungs.
The function of the right atrium is to act as a receiving and concentrating chamber for blood returning to the heart from its trip through the body systems. This blood is low in Oxygen and high in carbon dioxide. When the atrium contracts (beats) it sends its bolus of blood into the right ventricle of the heart which in turn will send the blood on to the lungs.
Artium Museum was created in 2002.
Probably "art of the teacher/master". I can't find an exact translation for "artium", but it seems to mean "art".
oxygenated blood
The opening between the right and left atrium is the foramen ovale. The duct connecting the pulmonary artery to the aorta is the ductus arteriosus.
Deoxygenated blood leaves the right ventricle through the pulmonary artery and goes to the lung to get oxygenated. The newly oxygenated blood leaves the lung and goes to the left artium through the pulmonary vein. This is called pulmonary circulation.
A.M. stands for "artium magister," from the Latin for "master of arts."