Which statement about the umbilical cord is true?

The umbilical cord is primarily composed of two arteries and one vein, which is essential for the proper functioning of the fetal circulatory system. The two arteries carry deoxygenated blood and waste products from the fetus back to the placenta, while the single vein transports oxygenated blood and nutrients from the placenta to the fetus. This structure is crucial for supporting the developing fetus, ensuring it receives the necessary oxygen and nutrients while simultaneously removing waste products.

The distinction between the number of vessels in the umbilical cord is significant in understanding fetal health. A cord that does not consist of two arteries and one vein may indicate potential anomalies or complications, emphasizing the importance of this typical configuration in prenatal assessments. Thus, understanding the anatomy of the umbilical cord and its function provides essential insights into fetal development and maternal-fetal medicine.