Bio Questions Please Help?

First of all teachers always know what they are talking about, it's just that many times the students aren't listening or they just don't understand.....do a google search on the anatomy of the heart to find your answers. you will find words like atrium, septum, ventricle, pericardial sac, pulmonary artery, capillaries, pulmonary vein, pulmonic valve, mitral valve, tricuspid valve, aortic valve, etc. good luck!