I agree with the others in that, to read properly, it needs to be two sentences. It's not technically incorrect, but the emphasis seems all wrong. Even if this is just a corpse among a bunch of other corpses, the fact that he has no arms - no arms! - is surely the first thing anyone would notice (including the person himself). So I'd put the bit about the arms first, and make it a single sentence. Then I'd put the straps bit as another sentence (if it is from the person's POV, at this point he will probably be thrashing about and screaming, and will discover that he's tied down).