Answer» The\xa0umbilical cord\xa0contains Wharton\'s jelly, a gelatinous substance made largely from mucopolysaccharides which protects the blood vessels inside. It contains one vein, which carries oxygenated, nutrient-rich blood to the fetus, and two arteries that carry deoxygenated, nutrient-depleted blood away.\xa0The\xa0cord\xa0is sometimes called the baby\'s “supply line” because it carries the baby\'s blood back and forth, between the baby and the placenta. It delivers nutrients and oxygen to the baby and removes the baby\'s waste products. The\xa0umbilical cord\xa0begins to form at 5weeks after conception.
