I was just looking at one of the questions from 2011 which said "Outline types of soft tissue injuries"
In the sample answers they only included tears, sprains and contusions, how come lacerations, skin abrasions and blisters were not included?
I'm not sure what the correct answer is according to your HSC syllabus, but to me, the reason is the distinction between skin injuries and soft tissue (muscle, ligaments, tendons, etc.) injuries - they tend to be a different mechanism, different things happen at a cellular level, etc.
Technically, skin
is a soft tissue, but I also see it get classified separately. I guess you can also talk about this as the difference between "open" wounds and "closed" wounds, but that's probably going off on a tangent.
There's also a general triphasic healing response that occurs (broadly speaking) with soft tissue injuries (inflammatory, repair and remodelling phases) - and I'd imagine that skin follows a bit of a different healing pattern.