Which of the following is true regarding fetal structures?

Question

Quizplus · Accepted Answer

The ductus arteriosus is a temporary blood vessel in the fetal heart that connects the pulmonary artery to the descending aorta, bypassing the lungs. This allows for oxygenated blood from the mother to bypass the lungs and go directly to the rest of the fetal body. After birth, the ductus arteriosus typically closes and becomes the ligamentum arteriosum.

None of the other answer choices are correct. The umbilical arteries actually carry unoxygenated blood from the fetus to the placenta, while the umbilical vein carries oxygenated blood from the placenta to the fetus. The foramen ovale is a temporary hole in the fetal heart that allows blood to flow from the right atrium to the left atrium, bypassing the non-functioning fetal lungs.

Which of the Following Is True Regarding Fetal Structures