Osmosis video - Development of the umbilical cord

The umbilical cord is the conduit between the developing fetus and the placenta. It contains two arteries and one vein, allowing for nutrient and oxygen exchange and waste removal. The development of the umbilical cord starts at around week three and is fully formed by week 7 of gestation. At this time, it consists of the stalk, vitelline duct, and umbilical vessels.