Beef is divided into large sections called primal cuts, which you can see in our beef cuts chart. These primal beef cuts, or "primals," are then broken down further into subprimals, or "food-service cuts." These are then sliced and chopped into individual steaks, roasts, and other retail cuts.
A side of beef is literally one side of the beef carcass that is split through the backbone. Each side is then halved between the 12th and 13th ribs. These sections are called the forequarter (front of the cow) and the hindquarter (back of the cow).
The most tender cuts of beef, like the rib and tenderloin, are the ones farthest from the horn and hoof. The toughest areas of the animal are the shoulder and leg muscles because they are worked the most.