Many years ago, when I worked with English folks, I was about to go to Coventry, England. My coworker was telling me they were famous for their blood sausage. I asked what was in it. He said, “The holes.”
“The holes?” I asked.
“Yes, you know, the holes. The ear holes, the eye holes… the… holes.”
This has stuck with me for almost 30 years now. All processed meat products are just the recombined leftovers of the real cuts.
Pic for reference.