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INBDE Integrated National Board Dental Exam Prep

Category - INBDE

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Which of the following structures of the adult heart is a remnant of the foramen ovale in the fetal heart?

Crista terminalis
Fossa ovalis
Sulcus terminalis
Right auricle

Explanation

Answer: B - The fossa ovalis, which lies on the atrial septum (separating the right and left atria), is the adult remnant of the fetal foramen ovale. Its upper margin is the anulus ovalis.

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