Thorax - transverse sectionYou selected: deltoidThe insertion of the deltiod muscle to the humerus of the arm can be seen in this section. The deltoid muscle forms the rounded musclular area over the shoulders. It helps abduct the shoulder joint, as occurs when you raise your arms to the side of your body.lungs | ribs | right atrium | left atrium | right ventricle | left ventricle | serratus anterior | latissimus dorsi | erector spinae | pectoralis major | Information Module Name: thorax Module Title: Thorax - transverse section Image Info: Gross specimen. Created by: Lynn Bry Contact Email:bryl@medicine.wustl.edu Last modified: Dec 12th, 1996 Created with Annotation 1.0 |