2.44 Main muscles (D)Online version Through this activity you will know the main muscles of the human body by Emir Barajas 1 Frontalis 2 Trapezius 3 Deltoid 4 Sternocleidomastoid 5 Pectoralis major 6 Biceps 7 Triceps 8 External oblique 9 Rectus abdominis 10 Quadriceps 11 Gastrocnemius 12 Tibialis anterior