Thorax - transverse sectionTransverse section through the thorax (from the Visible Human Project). Note the location of internal organs such as the lungs and the heart, including the differing sizes of the right and left ventricles. Anteriorly, the pectoralis major muscle overlies the rib cage. Laterally attachments of the serratus anterior muscle to the 3rd - 8th ribs, can be seen. Posteriorly, the latissimus dorsi, trapezius and erector spinae muscles may be seen. 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 |