Would there be a corpse, with the insides broken but still in one piece, or would it just be a pile of flesh and blood, with no physical resemblance?

Terminal velocity would be around 120 mph. I think people have had skydiving accidents before and were still mostly in one piece. I haven't exactly looked around for pictures though.

I saw a picture of a 9/11 victim and it was pretty gruesome. It was from one of the lower heights too (about 100 feet). He was kind of still in one piece, but it was gross anyhow.

Yes, a human would remain mostly intact. A heavier animal, like a horse, would splatter. A mouse would survive the fall.