A nurse is reinforcing teaching with a newly licensed nurse about the structures of fetal circulation. Which of the following statements by the newly licensed nurse indicates an understanding of the teaching?

The umbilical vein is located within the umbilical cord.

The ductus venosus is between the pulmonary artery and the aorta.

The placenta is located between the left and the right atrium.

The ductus arteriosus is located on the uterine wall.