For the front of the leg, you will need to draw the quadriceps (the large muscle in the front of the thigh) and the patella (the small bone in front of the knee). For the back of the leg, you will need to draw the hamstrings (the large muscle in the back of the thigh) and the calf muscle.

Sketch the muscles of the leg using overlapping curved lines. The muscles of the upper leg include the gracilis, sartorius, vastus lateralis, rectus femoris, vastus medialis, biceps femoris, semitendinosus, and semimembranosus. Note the curvature of the knee, and the muscles of the lower leg - the gastrocnemius, soleus, and tibialis anterior.

When drawing anatomy of the leg muscles, start at the top, where the leg connects to the pelvis. From there, the legs follow the same general form and function of the arms, although the legs contain a few more muscle groups. The front of the leg contains three main muscles that run about parallel from the hip down to the knee.