Fifth Ribs

Description

Colored emphasis isolates the right and left fifth ribs (costae V) within a lateral view of the male thoracic cage, with each rib curving anteriorly from its posterior attachment on the mid-thoracic vertebral column toward the sternum. Posteriorly, the head of rib 5 aligns with the T5 vertebral body at the costovertebral joint, while the tubercle meets the transverse process at the costotransverse joint; the rib angle lies just lateral to the vertebral column before the shaft sweeps anteroinferiorly. Anteriorly, rib 5 approaches the body of the sternum via its costal cartilage, sitting inferior to rib 4 and superior to rib 6 at the costal margin region. The vertebral column remains in profile, with thoracic kyphosis transitioning to lumbar lordosis inferiorly. Rib 5 sits squarely in the mid-thorax, making it a reliable landmark when teaching rib counting from the sternal angle (manubriosternal joint) at the level of the second costal cartilage, then tracking down to the fifth intercostal space. That matters clinically: a left anterolateral thoracotomy commonly uses the fourth or fifth intercostal space, and safe entry depends on respecting the neurovascular bundle (intercostal vein, artery, nerve) that runs along the inferior border of rib 5 within the costal groove. Pain localizing to this rib level also raises practical differentials, from an isolated fifth-rib fracture after blunt trauma to referred pain patterns along the corresponding intercostal nerve. Use this asset in gross anatomy lab manuals, thoracic wall lectures, and publisher figures on thoracic osteology, rib articulation, and surgical approaches to the pleural cavity. It also fits clinical skills content on surface anatomy, chest tube planning, and procedural safety at the mid-axillary line. Anatomical accuracy verified by SciePro's Medical Advisory Board.