Trump just moved it to another level.
He is the In-group and everyone else is the Out-group all depending on how big of a shit he took in his diaper, how sweet the diet coke in his cup is, who the last he spoke to pointed him towards commenting at, and how many uppers he shoved down his throat with his big Mac.
These were probably originally drawn from organs pulled out of cadavers and sketched or drawn while laid out on a table.
When we think of organs we think of them all separate like we see in books instead of the truth that they are all jammed together with no open space to see.