What is the process for skin healing?
Random example: I fall and skin my knee. It bleeds. It scabs. Eventually I have new skin, perhaps as a scar, or if not that bad of an injury just regular skin. How does this happen? Where does this new skin come from? Does it grow from the skin you already have and fill in any holes, or is there something in the blood that turns into skin? RANDOM thought. I just came to realize that I have absolutely no idea!