The stomach and heart/lungs.... This person who previously answered this question with just those 3 things also forgot some major organs... Pancreas, Liver, Upper Intestines, Lower Intestines (the L.I. are right behind the belly button)
The urinary bladder, the sigmoid colon, the rectum, and in females, the uterus.
There is more than one. The liver, spleen, pancrease and gall bladder are all on the right side.
Abdomen
A belly button ring is a body piercing placed in a cauterized area of the belly button.
This means you are piercing your navel .. navel is the phrase for the area above the actual belly button** ( **other wise known as the umbilical knot)
belly button
umbilical area
Go to the doctor
A belly piercing is a piercing on the belly button. Where your belly button might go in or out, it is the slight arch you get just above it. it is a piercing through that area. depending on how your belly button is formed. Search google for images.
Umbilical Knot 'Navel' is more common The "Navel" is the area around the "belly button"
Appendicitis
The navel.
The navel.
Umbilical Hernia. Not particularly dangerous, but get it checked out. You'll experience soreness and tenderness around the belly button area, and it's possible your belly button might swell and protrude a little. Usually results from injury or impact to the area.