Oh, dude, you're talking about the foreskin! It's like the extra sleeve that gets removed during a circumcision. Some people keep it for sentimental reasons, you know, like a weird souvenir.
Circumcision is when you remove skin from genitalia. On the men the foreskin and on the women parts of the vulva or all of it. Female circumcision isn't called circumcision anymore but female mutilation since that is what it is. It's more extensive then it is on men and more damaging. More here: http://en.wikipedia.org/wiki/Circumcision
No, circumcision is the removal of the foreskin of a penis. I suppose if someone removed the "hood" of skin over the clitoris on a female, that would be considered circumcision. That may be done in some countries and cultures, but not in USA.
No, if the left over skin was implanted into the body it would not survive.
This is called phimosis, where the skin of the foreskin becomes tight and sometimes painful. It can be alleviated by gentle stretching and if this does not help, surgery or circumcision can be indicated.
If any foreskin remains, it's a partial circumcision.
The closest to that would be "skin bridges" and you need to see a doctor for that.
The loose skin that covers the glans and also salt, urea and uric acid.
Talk to the surgeon about it.
If you don't have foreskin that means you have been circumcised. Circumcision is a surgery during which part of the skin of the penis, called the foreskin, is cut off of the rest of the penis. After circumcision the head of the penis is always exposed since there is no foreskin left to cover it. Foreskin does not grow back after it has been cut off. Most circumcisions are performed when boys are only a few days old, which is why you don't remember it.
The foreskin is a fold of skin that covers the head (glans) of the penis.
The dermis is often called the true skin. It has a layer over it called the epidermis and one below it that has a lot of fat cells. That is called the subcutaneous layer. (cutaneous means skin).
Circumcision always requires an incision as it is a surgical removal of part of the skin of the penis. The type of incision used depends on the surgical technique being used.