Body of femur

The femoral shaft, knows as the body of femur, is cylindrical in shape. It is oriented obliquely downward, resulting in wide space between the upper ends of the femur to accommodate the pelvis, while the lower ends are closer together to facilitate approximation of the knees.

The middle one-third of the body of femur is characterized by three borders: medial, lateral, and posterior. The posterior border is sharp and features a ridge-like margin called the linea aspera, which has distinct medial and lateral ridges. Along the linea aspera, various muscles and intermuscular septa are attached, including the adductor magnus, vastus lateralis, short head of biceps femoris, vastus medialis, adductor longus, and adductor brevis muscles. For additional information, please refer to the description of the linea aspera.