Umbilical Cord
It connects the baby to the mother's placenta. It has three blood vessels: one vein (red) that carries food and oxygen from the placenta to your baby and two arteries (blue) that carry waste from your baby back to the placenta.
Fetus
The unborn offspring developed from the embryo is called fetus. During fetal development in the womb, the umbilical cord is the lifeline to the baby supplying nutrients.
Placenta
The placenta is an organ that develops in the uterus during pregnancy. It provides oxygen and nutrients to a growing baby. It also removes waste products from the baby's blood. The baby's umbilical cord arises from it.