What is the umbilical region?

I believe the question should have been " What is the umbilical region? If that was the question , then with reference to mammals-- The umbilical region is a small area of of about two inches' radius with the centre at the centre of the navel. Navel is another term for the umbilicus. The umbilicus represents the point at which the umbilical cord of placental mammals was connected to the mother'womb before birth.