Match the following fetal structures with their adult derivative
1: Foramen ovale
2: Ductus arteriosus

Question

BlackTom AI · Accepted Answer

This matching question asks us to pair fetal structures with their adult derivatives. We'll evaluate each answer option in turn to see if it correctly corresponds to one of the two fetal structures listed.

Option A: Fossa ovalis
- The foramen ovale in fetal life allows blood to bypass the nonfunctioning fetal lungs. After birth, this opening typically closes and leaves the fossa ovalis as a depression in the right atrial wall. Therefore, Fossa ovalis is the correct adult derivative for the Foramen ovale.

Option B: Ligamentum teres (round ligament of the liver)
- The ligamentum teres is the remnant of the umbilical vein, which carried oxygenated blood from the placenta to the fetus. It is not the derivative of the foramen ovale or the ductus arteriosus. This option is incorrect for the given pair and also reflects a common confusion with other fetal-to-adult remnants.

Option C: Ligamentum arteriosum
- The ductus arteriosus in fetal circulation shunts blood from the pulmonary artery to the aorta. After birth, the ductus arteriosus closes and becomes the ligamentum arteriosum. Thus, Ligamentum arteriosum is the correct adult derivative for the Ductus arteriosus.

Option D: Falciform Ligament
- The falciform ligament is a peritoneal fold that attaches the liver to the anterior abdominal wall and diaphragm, associated with the ventral mesentery during development. It is not the remnant of either the foramen ovale or the ductus arteriosus. This makes it an incorrect choice for this pairing.

In summary, the correct pairings are: Foramen ovale → Fossa ovalis, and Ductus arteriosus → Ligamentum arteriosum. The other options refer to different fetal structures or remnants and do not fit the given matches.

ANATOMY 2300 SP2025 (2146) Unit 5 Exam- Requires Respondus LockDown Browser

Match the following fetal structures with their adult derivative 1: Foramen ovale 2: Ductus arteriosus

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