Which of the following accurately describes the structure of the umbilical cord?

The structure of the umbilical cord is such that it is designed to facilitate the transfer of essential nutrients and oxygen from the placenta to the fetus. The umbilical cord actually contains one umbilical vein and two umbilical arteries, with the vein carrying oxygenated blood from the placenta to the fetus, which is vital for fetal development. This arrangement allows the fetus to receive the oxygen and nutrients necessary for growth while simultaneously transporting waste products back to the mother for elimination.

In context, while there are other options that mention blood supply, they either confuse the roles of maternal and fetal blood or misstate the number of vessels in the cord. The correct answer accurately reflects the function and structure of the umbilical cord in supporting fetal development through the transport of oxygenated blood.