Thorax - transverse sectionYou selected: intercostal muscleThe intercostal muscles lie between the ribs. They help elevate the ribs during inspiration. This action allows the lungs to expand within the thoracic cavity.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 |