"Well, it's radiation damage really. See, with just a cut, there's no real physical damage, it's just where stuff is supposed to be is not. So it's just getting it back together, if that makes sense. Radiation damage hurts the actual cells, so you can't just put the damaged cells back in place, or they'll cause more problems. Most of the complex work we do in medical is undoing that sort of damage. Cuts and scrapes, that's simple. Repairing an endocrine system after you've gotten some kind of range virus, that's tricky."

Tendi puts the Dermal regenerator back and takes out the autosuture. "This works in a similar way, but it deals with deeper wounds, where just a simple regeneration may not be effective, but I won't ask you to gash your arm open to show you how, don't worry!"