Final answer:
Interatrial pertains to the region between the atria and is associated with the atrioventricular septum, which contains the fossa ovalis after birth and houses the atrioventricular valves.
Step-by-step explanation:
The medical term that means pertaining to between the atria is interatrial. This term relates to the atrioventricular septum, which is the cardiac septum located between the atria and ventricles. The atrioventricular, or interatrial septum, contains the fossa ovalis after birth, which is a remnant of the fetal foramen ovale. The atrioventricular septum also houses the atrioventricular valves, which include the tricuspid valve on the right and the bicuspid or mitral valve on the left.
The atria are the two chambers of the heart that receive blood from the veins. Between these atria is a structure called the interatrial septum, which divides the heart into chambers. The interatrial septum contains the fossa ovalis, which is a depression after birth.The atrioventricular, or interatrial septum, contains the fossa ovalis after birth, which is a remnant of the fetal foramen ovale. The atrioventricular septum also houses the atrioventricular valves, which include the tricuspid valve on the right and the bicuspid or mitral valve on the left.