Beef Lungs and Tracheas
In Argentina (like in most other parts of the world), you can buy any organ of a beef at the butcher store.
Did I mention that being vegetarian is illegal in Argentina? (just kidding!)
I took this photo at the Mercado Central in Salta (Argentina).
In developed countries, many people do not want buy those organs, so they are processed industrially, shredded and turned into sausages, meat-loaf or dog food.