Pectoralis Major Muscle See the Origin & Insertion of the Pectoralis major Origin: - Clavicular head: Medial half of clavicle - Sternocostal head: Sternum and costal cartilages (1-6) - Abdominal head: Aponeurosis of external oblique muscle Insertion: - Humerus: Crest of greater tubercle 👨‍🎓Learn Anatomy with clear & engaging 3D videos! Thanks for watching The Muscle and Motion team | Muscle & Motion

External abdominal oblique is a paired muscle located on the lateral sides of the abdominal wall. Along with internal abdominal oblique and transversus abdominis, it comprises the lateral abdominal muscles. In a broader picture, these muscles make up the anterolateral abdominal wall together with two anterior abdominal muscles; the rectus abdominis and pyramidalis. Origin and insertion External abdominal oblique muscle originates from the external surfaces of ribs 5-12. The attaching fibers inte