Pork Tenderloin, Tenderloin (Tenderloin), is a strip of tenderloin on the inside of a pig's vertebrae. Tenderloin is usually divided into large tenderloin and small tenderloin, large tenderloin is the large ribs connected to the lean meat, the outer side of the tendon covered, usually eaten after the big row of bone is tenderloin, suitable for stir-frying with vegetables. Small tenderloin is a muscle on the inside of the vertebrae, less, very tender, suitable for soup.