CLICK HERE TO VIEW: Coronary Circulation: Arteries and Veins: AnatomyTime.Com
Check our this link, showing the Heart Anatomy and Definition for general sections of the Heart:
Heart Anatomy by Cardiovascular Consultants
Definition List of general "Veins"
FOSSA OVALIS IN THE INTERATRIAL SEPTA: Explained in video below
The interatrial septum forms during the first and second months of fetal development. Formation of the septum occurs in several stages. The first is the development of the septum primum, a crescent-shaped piece of tissue forming the initial divider between the right and left atria. Because of its crescent shape, the septum primum does not fully occlude the space between left and right atria; the opening that remains is called the ostium primum. During fetal development, this opening allows blood to be shunted from the right atrium to the left