what is the Diffrence between a Human and Pig?

Pig do not have an appendix and the bones are structured differently.
All pigs are pretty much the same as Humans.
Anatomically they are similar than Humans.
Intestine is different, a pig as a two circle around it and we only have one.
The heart is the same.
You would think that since pigs hearts are same that they would use them for transplants, but they don't.