The butcher chops it all.
You need the context to identify the parts.
So before getting into the details of your beloved issue, you should give your readers the chance to get to know what you are talking about!
Some weeks ago i sat in an english steak house and – unfortunately – i was not quite familiar with all these english expressions for the different grilled parts, which once formed a quite agile cow before it was split into parts. The restaurant was very kind in offering a seemingly great help for all these innocent guests like me: On the fourth page the menu showed a very nice looking infographic page, so even i should be able to understand what meat i want. The mapping of the different steaks and roasts an plates was very detailed and i couldn’t believe that you can serve so many different dishes from one cow. But as i was glad to get all this help to choose my meal, i struggled about the part called „chuck“. What exactly was a „chuck“? And than i stumbled about the „loin“? And while i tried to figure this out, got worse and worse: I realized, that i didn’t get a clue of any part of it, as i didn’t know how i have to place the whole shape inside a cow. So in the graphic you can follow my tries, but in the end i was not able to solve this riddle at all… and finally i chose a salad.
So before drawing and texting all of these tasty parts in the graphic, it would have been much more helpful to show the pattern on a cow. If you want to describe some detail, you should always start with the context before your audience can follow your steps.