But the appearance of Orcs disparage wildly throughout the games, as graphics dont fit to lore means, we cant objectively look at any orc and tell. I mean in Daggerfall Argonians looked like 2 legged insect dragons!
Well, as I said, they have the pointed ears, a tell-tale sign of Merish relation. You can even see the Giants in Skyrim have pointed ears. Other than that, there's not much resemblance, other than two-arms, two-legs, etc. Their body structure is very different from any of the Mer we've seen, and their facial structure is very unique.
Where did you get this information about the Orcs and Nords?
http://www.imperial-library.info/content/morrowind-varieties-faith-empire
At one time, legends say, Nords only had a lifespan of six years due to Orkey's foul magic. Shor showed up, though, and, through unknown means, removed the curse, throwing most of it onto the nearby Orcs.