________ Floor of the Oval Fossa

Question

________ Floor of the oval fossa
A)Ductus arteriosus
B)Septum primum
C)Sixth pharyngeal arch artery
D)Sinus venosus
E)Umbilical vein

Accepted Answer

The floor of the oval fossa in the heart is formed by the septum primum. This structure is crucial during fetal development for the proper separation of the atria.