Development

Cross Sectional View

A 750 pound carcass was separated into right and left sides and was chilled to approximately 350 F. The lower portions of the pelvic and thoracic limbs were removed at the tibiotarsal and radiocarpal joints. The right side was cut into each sub-primal (chuck, brisket/foreshank, plate, rib, loin, flank, and round). Then each sub-primal was cut into cross sections of 1 inch thickness to show the progression of muscles and their relationship to the skeleton and to fat deposits. The cross sections were allowed to bloom and pictures were taken with the cross section being illuminated with strobe flashes. The posterior view of each cross section is shown. The diagrams that accompany each of the photographs serve to help identify the items in the photographs more easily. In the diagrams, individual muscles are shown in a red color, bones are shown in a light pink color, and cartilage is shown colored in solid black. The creamy brown areas represent fat. Each diagram's position is identified anatomically by terms appearing within the illustration.

Lateral Views

Another 750 pound carcass was divided into the forequarter and hindquarter. The hindquarter was dissected by removing fat to expose underlying muscle. The left side of the 750 pound carcass was also divided into a forequarter and hindquarter. The forequarter was dissected similarly as the hindquarter. After each individual muscle was removed the carcass was photographed. Each muscle that was removed was identified and highlighted in red on a diagram to help make identification of the muscles easier. The muscles removed from each layer are also listed below the diagram.

Sub-primals

The sub-primal cuts were identified from a 750 pound carcass. The Institutional Meat Purchase Specifications were used as a reference in making these cuts. Each sub-primal was photographed on a rotational table to allow a 360 degree view of the specified cut. These rotations involved 16 pictures, each rotating 22.5 degrees, during which the sub-primal was illuminated with strobe flashes.