What's a Belly Button? Your belly button marks the spot where your umbilical (say: um-BIL-ih-kul) cord was once attached. This cord is a soft, bendable tube that carried nutrients — vitamins and minerals — from your mother to you, back when you were in her belly (womb). A belly button is also called a navel. Why Did I Once Need an Umbilical Cord? When a baby grows inside its mother, it can't eat food or breathe air. That's where the umbilical cord comes in. Not only does it carry nutrients, but it also takes away the waste that the baby doesn't need anymore. Bye, Bye, Cord! Hello, Button! When the baby is born, he or she lets out a cry. This lets everyone know that the baby can breathe on his or her own. The baby will also soon be drinking milk and getting rid of wastes on his or her own — as anybody who has seen a dirty diaper will tell you! The brand-new baby doesn't need an umbilical cord anymore. The doctor cuts the umbilical cord and a tiny stump is left. When this stump falls off after a few weeks, the baby is left with his or her very own baby belly button. The belly button might be an innie or an outtie — which kind do you have? Back to Articles Related Articles Welcoming a New Baby Into Your Family Babies are wonderful, but what is it like when a new brother or sister comes home? Find out in this article for kids. Read More Why Does My Foot Fall Asleep? Is your foot asleep? Find out why in this article for kids. Read More Why Do Feet Stink? Your hard-working feet sometimes start stinking. Find out why in this article for kids. Read More Why Does My Skin Get Wrinkly in Water? What happens when you spend a long time in the water? Your skin gets wrinkly! Find out why in this article for kids. Read More Why Do I Burp? A burp - sometimes also called a belch - is nothing but gas. Find out more about burping and what to do if it happens to you in this article for kids. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.