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Anatomy · Embryology
Sample itemWhich embryological structure becomes the fossa ovalis after birth?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Foramen ovale
The fetal foramen ovale normally closes after birth as left atrial pressure rises, leaving a depression in the interatrial septum called the fossa ovalis.
Option by option
A. Ductus venosus
Ductus venosus becomes ligamentum venosum.
B. Foramen ovale (correct)
Correct: foramen ovale forms the fossa ovalis.
C. Ductus arteriosus
Ductus arteriosus becomes ligamentum arteriosum.
D. Umbilical artery
Umbilical arteries become medial umbilical ligaments.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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