What is on the other side of the umbilical cord?
I've often wondered this (at times while I'm laying in bed trying to sleep, and contemplating life in general) and have yet to find an answer.
The placenta and umbilical cord is a two-way street between mother and baby, giving nourishment and taking waste. Once the umbilical cord passes what will eventually be the belly button, what is on the inside of the fetus? Is the mothers blood just absorbed by the internal organs or is there actually something on the inside of the fetus that feeds it into the heart and/or other significant arteries?
And once the cord is cut, what happens to that section that was on the inside? Does it die and get absorbed by the body? Is it the withered and seemingly useless appendix?
Yes, the mysteries of life (to my un-medically-educated self) that I seek answers too.