That's how they get nutrients.
Through the umbilical cord.
Nutrients pass through the placenta into the baby through the umbilical cord.
The umbilical cord send food to the baby
The baby is fed through the umbilical cord and receives everything that the mother ingests.
The fetus receives nutrients through the umbilical cord.
Babies don't eat while in the womb. Nor do the breathe. they get fed nutrient rich blood through the umbilical cord.
A fetal pig is fed by its mother through an umbilical cord just like a human fetus.
Like every other unborn mammal - through an umbilical cord hooked to the placenta hooked to the mother.
As a fetus gestates within its mother's womb, it is fed by a tube from a temporary organ called the placenta. The tube connects to the baby's belly. When the baby is born the tube is usually tied off and cut, and the remnant dries out and drops off in due course. The place where the umbilical cord was attached is called the navel or belly button.
This is an unborn baby pig, and has never eaten anything. It got its nutrients via the placenta from the mother.
Not unless you're talking about some species of sharks. Mammal babies have umbilical cords, and are fed all they need through that, through their mother's blood stream.
The bellybutton is a scar which occurs when the umbilical cord is removed after birth. The umbilical cord is what connects the feotus to the placenta of the mother and is how the feotus is fed by the mother whilst in the womb. Related links: http://www.nhs.uk/chq/Pages/2299.aspx?CategoryID=54&SubCategoryID=128 (NHS umilical cord) http://en.wikipedia.org/wiki/Belly_button