Anatomy · Bos taurus

Beef

Beef — Anatomy Atlas
8 primals · Bos taurus
About this species

Beef is the sommelier’s widest canvas. A steer carries eight major primals, and the gulf between them is enormous: the constantly working chuck and brisket are laced with collagen and built for the smoker and braising pot, while the rib and short loin — barely used in life — give us the ribeye, the filet and the porterhouse that need nothing more than fierce heat and a few minutes’ rest. Marbling, the fine web of intramuscular fat, climbs steadily as you move along the spine toward the rib.

Working muscles vs. support muscles

Muscles that move the animal constantly — neck, shoulder, leg — are dense with connective tissue and collagen. They reward low, slow, moist heat that melts collagen into gelatin. Muscles that mostly support weight rather than move it — the loin and rib along the spine — stay tender and suit fast, dry, high heat. Location on the chart is the single best predictor of how a cut wants to be cooked.

Primals

Select a primal to reveal its muscles, character and the cuts it yields.

The chuck covers the neck and shoulder, yielding heavily worked, collagen-rich muscles ideal for slow braising or grinding; it produces value cuts like flat iron and Denver steak.

Key muscles
Longissimus dorsi (extension)InfraspinatusSupraspinatusSerratus ventralisTriceps brachiiComplexusTeres major
Cuts from this primal
Explore this part (18 cuts)