Probably "art of the teacher/master". I can't find an exact translation for "artium", but it seems to mean "art".
Artium Museum was created in 2002.
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.
Mitrial valve
It stands for Artium Baccalaureatus (A.B.) Degree. It is awarded to students who follow this centuries-old tradition and include in their studies significant coursework in the Classics.
Girolamo Visconti has written: 'Magistri Hyeronimi Vicecomitis Lamiarum sive ..'
The papillary muscle.
A.M. stands for "artium magister," from the Latin for "master of arts."
Vena Cava
Bachelor of Arts (originally Baccalaureus Artium in Latin)
Cesare Orsino has written: 'Magistri Stopini poetae Ponzanensis, capriccia macaronica'
A Master of Arts (Latin: Magister Artium)