What is the difference between the convex and concave fate of navel?

Usually careful friends may find that each of us has a different belly shape. Some people are concave, some people are convex, and some people even look dreamy.

Some people's navel is a sunken hole, some people's navel is like a prominent meat ball, and some people's navel is like a knot. ...

So from a scientific point of view, what is a belly button? Why do some people have a protruding navel and some people have a depressed navel?

The navel is actually the "first knife" in our life.

When we were still in our mother's belly, we didn't have the ability to breathe and eat. Everything depends on a "pipeline" connecting mother and us-umbilical cord. Because of it, we can grow up slowly.

And when we break out of the cocoon and start to leave the mother's body, we must breathe and eat by ourselves. At this time, the umbilical cord that we used to rely on wirelessly will lose its function. The doctor will cut them off and tie them, and the rest will slowly grow new skin and become the navel.

Why are some convex and some concave?

Some people will blame the doctor who cut and ligated the umbilical cord at that time, but in fact, the umbilical cord shape has little to do with umbilical cord ligation. No matter how the umbilical cord is ligated, the umbilical cord stump will experience shedding, necrosis and depression ........................................................................................................................................................ Therefore, don't blame the ugly navel on the doctor who ligated your umbilical cord, and don't blame you for too much fat accumulation. )

A thin person's abdomen is flat, and his navel is happy to stay where it is, so it looks very shallow; Obese people have thick abdominal fat. The more belly fat, the thicker belly meat. Because the navel is connected with the ligamentum teres hepatis, it can't move at will, but it can only stay where it is, sinking deeper and deeper and becoming a hole.

Some children and pregnant women will have their navel protruding due to high abdominal pressure, but usually the children will recover by themselves when they grow up, while the abdominal pressure of pregnant women will decrease and the navel will retract after delivery. Generally, you don't have to worry too much about this abnormal navel shape.

In addition, according to the general law of human growth, the position of navel is usually 1/2 of human body length, that is, the position of center of gravity.

For athletes, if they are engaged in "running and jumping" sports, the higher the center of gravity, the longer the lower body, the greater the stride and the stronger the running and jumping ability; For wrestlers and judo athletes, the lower the center of gravity, the more stable the chassis. Therefore, it is said that looking at the navel position has also become an "indigenous law" for coaches to select athletes.

So, is your navel convex or concave? Have you found the answer to how the navel shape is formed?