2. Beef refers to the meat obtained from cattle and is one of the common meats. Sources can be cows, bulls and heifers. The muscle part of cattle can be cut into steak, beef pieces or beef bones, and can also be mixed with other meats to make sausages or blood sausages. Other edible parts include oxtail, liver, tongue, louver, pancreas, thymus, heart, brain, kidney and kidney.