Use of belly button i mean navel
Plz dont give copied answer
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Use of belly button!
You’re getting a belly button regardless of how your birth goes, and the idea that your delivery room doctor has any influence over this is just one of the many myths surrounding pregnancy and birth. The belly button marks the area where your umbilical cord used to be attached, says Christopher S. Baird, PhD, a physics researcher, instructor, and adjunct professor at the West Texas A&M University.
When you’re in the womb, your umbilical cord attaches to your navel at one end and your placenta—a mass of blood vessels attached to the wall of your mother’s uterus—at the other. Your mother’s food and oxygen goes through her blood to the uterus where they are exchanged to your blood, which carries the nutrients from the placenta, down the umbilical cord, through your navel, and finally into your body.
Once you are born, the umbilical cord becomes useless now that your mouth, lungs, and digestive tract are functioning. The body responds to the transition by closing up the point where the umbilical cord connected to your body and created a belly button.
To free the body of the useless umbilical cord, your doctor cuts it down to a mere stub that hangs off your stomach. Within a few days to weeks, the stub will fall off as a result of the belly button naturally closing. Check out the surprising purposes of eight strange body parts.
Not all mammals have a belly button
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Every human gets one, and each is distinctive—with twins, the belly button might be the easiest way to tell them apart. By the time you’re born, the belly button’s job receiving oxygen and nutrients through the umbilical cord is finished.
You would expect all mammals to have a belly button, but there are a couple of exceptions: Marsupials (like kangaroos and opossums) and the two egg-laying mammals (platypus and echidna). With the egg-layers, it makes sense that they could skip this valuable port into the digestive system. But how do marsupials get away with it? The fetus is incubated for much less time—about four to five weeks, so their need for in utero nutrition is less. After birth, they crawl up to mom’s pouch and latch on to a nipple, and do the rest of their fetal development there. Yes, your dog or cat has one—you just may not have noticed them because they’re usually smooth or flat and covered by fur.
Most start as outies
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While most belly buttons begin as outies, the majority pop in to form innies, with only 10 percent of people holding onto their outies through adulthood. The reasons reinforce the idea that a doctor has little to do with the end result.
“The difference between an ‘innie’ and an ‘outie’ belly button has nothing to do with management of the umbilical cord at birth,” reports Trey Eubanks, MD, chief of Surgery and medical director of Trauma Services for Le Bonheur Children’s Hospital in an article for the hospital. This reinforces the lack of a doctor’s role in your belly button. “Most people who have an ‘outie’ fall into one of two categories: Either they were born with a tiny umbilical hernia, which is most likely, or had a small infection at the base of the umbilical cord that went unnoticed. This will cause unusual tissue called granulation tissue to form. Later in life, this looks like a knot or polyp of skin protruding from the base of the umbilicus.”
While there is a 90 percent chance that any child born with an outie will eventually have an innie by the time they are five years old, the chances of it switching are slim to none after this age. Here are some strange facts about the the things you’ve always wondered about your body
Your mother's food and oxygen goes through her blood to the uterus where they are exchanged to your blood, which carries the nutrients from the placenta, down the umbilical cord, through your navel, and finally into your body.