Placeholder Image

Subtitles section Play video

  • It's one of the very few things that all  human beings have in common - we all have one,  

  • even if they might look a little bit  different. Of course, we're talking  

  • about belly buttons. Innie or outie belly  buttons - why do some people have them?

  • Why do humans even have belly buttons in the first  place? Believe it or not, the answer goes back  

  • to before we were even born. As a human fetus is  growing inside its mother's uterus, it can't eat,  

  • drink or breath on it's own - you know, all  those things that keep us alive. To survive,  

  • the baby needs to get all of these things directly  from the mother. The baby is connected to the  

  • mother's placenta by the umbilical cord, and all  of the nutrients and oxygen that the baby needs to  

  • survive travel from mother to baby through  the umbilical cord. Once the baby is born,  

  • though, it can finally drink milk and breath  on its own, and the umbilical cord becomes  

  • useless. That's why, shortly after birththe doctor will clamp or cut the cord,  

  • severing the connection between mother and  baby. Within a week of birth, the little  

  • piece of the umbilical cord that is left will dry  up and fall off, and what's left behind becomes  

  • our belly button. That means that our belly  buttons are actually our very first scars.

  • Now we know why all humans have belly buttons  - by why do some people have an innie,  

  • while others have an outie? Just like the name  implies, an innie belly button looks like a deep,  

  • dark hole, and it is by far the more common type  of belly button - about 90% of people have an  

  • innie. An outie, on the other hand, pops outwards  like a little button, and only about 10% of people  

  • have one. Whether a person has an innie or an  outie depends on how the scar tissue forms after  

  • the umbilical cord is cut. Contrary to popular  belief, the doctor who cuts the umbilical cord  

  • has very little control over whether a baby will  have an innie or an outie. Cutting the umbilical  

  • cord longer or shorter doesn't guarantee  an innie or outie belly button will form,  

  • so unfortunately we can't request our  preferred belly button type at birth.  

  • Instead, it actually depends on how much space  there is between the skin and the abdominal  

  • wall - less skin leads to an innie, while more  skin makes it more likely to have an outie.

  • Humans aren't the only animals with belly  buttons - most mammals have them. But,  

  • since most animals chew off the umbilical cord  themselves rather than neatly cut it and let it  

  • dry up and fall off, the resulting scar is usually  much flatter and harder to see on other animals,  

  • and it tends to look more like an  “in-betweeniethan a typical innie or outie.

  • So, what if someone really hates their belly  button? Is there anything that can be done to  

  • reshape it? As a matter of fact, there isAn umbilicoplasty is a type of surgery that  

  • can turn a less common outie belly button into  the more common, and arguably more desirable,  

  • innie. Anyone willing to fork over $2,000  dollars for the 45 minute procedure can finally  

  • have the belly button of their dreams. While the  procedure is usually done for cosmetic reasons,  

  • it might also be required to repair an  umbilical hernia, a rare complication  

  • where part of the intestine pokes through  the umbilical opening in the abdominal wall.

  • So, do our belly buttons actually do anythingBesides collecting lint and bacteria,  

  • the answer is no. Belly buttons are simplyuseless scar, but a 2012 study did find that  

  • there are more than 2,300 different types  of bacteria in the human belly button,  

  • so that's something, we guessAnd speaking  of lint, have you ever wondered why your  

  • belly button seems to collect so much of it? It's  actually because of a special type of hair that  

  • grows in our belly buttons. We can thank these  fluffy hairs, which have tiny barbs on them,  

  • for getting stuck to our clothing and leaving  us with a dryer's worth of belly button lint.

  • Thanks to their prime location  at the very center of our bodies,  

  • the belly button has held a special place  in many cultures throughout history,  

  • but it wouldn't do to be caught spending too  much time admiring one. The term navel-gazer is  

  • reserved for a self-centered person who spends too  much time looking at themselves. For someone with  

  • omphalophobia, though, it likely wouldn't matter  whether they have an innie or an outie - thanks  

  • to their fear of belly buttons, they probably  wouldn't spend much time naval-gazing, anyways!

  • If you thought this video was interestingbe sure and check out our other videos,  

  • like this video calledThis Is Why You're Fat”.  Or, perhaps you'll like this other video instead.

  • As always, thanks for watching, and don't  forget to like, share and subscribe!

  • See you next time!

It's one of the very few things that all  human beings have in common - we all have one,  

Subtitles and vocabulary

Operation of videos Adjust the video here to display the subtitles

B2 belly belly button button cord baby lint

Outie Belly Button - Why Do Some People Have It?

  • 35 2
    Summer posted on 2020/12/10
Video vocabulary