If you already have an acceptance for med school, then I'd use that time to travel or do bucket-list things, if you can. It's much more fun to talk about during an interview than that you volunteered at a pathology office doing schlepp work or maybe a little research, and probably much more fun period. There will be time to get some experience in pathology during medical school, although you'll have to go a little out of your way to do it -- or if you're really concerned, spend a month at a pathology department/office somewhere just to get a little real-world exposure to it. I wouldn't do an entire year -unless- you latch onto something which really and truly interests you -- not solely because you're worried it's the only/best way to further your career.
Just saw your reply pop up -- If the finances aren't there.. well, I can't think of an obvious relevant job-job in the market as a finishing undergrad without already having a connection. But I'd agree with asking around the local departments. It's been a while, but I don't remember finishing my application stuff until sometime in my senior year of undergrad, though I don't remember what I had to include as far as when I "had" to have finished any requirements as I already had MCAT results in hand. In fact, I'm not sure I recall there being any course requirements per se, so long as one did adequately on the MCAT -- and it may be that you're delaying that until after some relevant courses, or the applications may not be what I recall, either. Probably beside the point.
