After thinking about what happens when you injure yourself...

Where does the discarded skin from the injury go?

For example, lets say you fall and scrape your knee pretty badly.
Where does the discarded knee skin go? I mean it could still be hanging off of the injury, but most of the time you dont see that (Well at least I dont)
And you dont usually see a little flap of bloody skin on the ground either...

So where does it go?


Sorry it's a random question, but I truly am curious for the answer!

Thanks!