Which statement is true about the umbilical cord's role in nutrient transportation?

The umbilical cord plays a critical role in fetal development by facilitating the transportation of nutrients from the mother to the fetus. This structure contains blood vessels that are responsible for moving oxygen-rich blood and essential nutrients, such as glucose and amino acids, which are vital for the developing fetus. As the mother consumes food, these nutrients are absorbed into her bloodstream and then transferred to the placenta. The umbilical cord acts as a conduit between the placenta and the fetus, ensuring that the developing baby receives the necessary substances for growth and development.

The other statements do not accurately describe the umbilical cord's function. While waste products are indeed exchanged, they are transported differently and not as the primary role of the cord. The umbilical cord does not connect directly to the mother's heart; it connects to the placenta, which then interfaces with the maternal circulatory system. Furthermore, while the umbilical cord is essential for the fetus's circulatory needs, it is not solely responsible for blood circulation but serves primarily as a connection for nutrient and gas exchange.