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Body Atlas, Bone Reference

Bones

Full skeletal reference, surface landmarks, articulations, ossification, fracture patterns, and clinical significance.

411 bones
411 bones
Bone Rib Angle angulus costae Chest The rib angle is the posterior curvature point of the rib where it bends abruptly forward… Bone Rib Cartilages cartilagines costales Chest The costal cartilages connect the rib ends to the sternum (ribs 1 through 7) or to… Bone Rib Head caput costae Chest The rib head is the posterior medial end of the rib that articulates with the thoracic… Bone Rib Tubercle tuberculum costae Chest The rib tubercle is a bony prominence on the posterior rib between the rib neck and… Bone Ribs 11–12 (Floating Ribs) costae fluctuantes Chest The eleventh and twelfth ribs are floating ribs with no anterior cartilaginous connection — they articulate… Bone Ribs 2–7 (True Ribs) costae verae Chest Ribs 2 through 7 are true ribs that connect to the sternum directly via their own… Bone Ribs 8–10 (False Ribs) costae spuriae Chest Ribs 8 through 10 are false ribs whose costal cartilages do not connect directly to the… Bone Sacral Ala ala ossis sacri Pelvis & Hip The sacral ala (wings of the sacrum) are the lateral masses of the sacrum formed by… Bone Sacral Body corpus ossis sacri Lower Back The sacral body comprises the five fused sacral vertebral bodies forming the anterior curved surface of… Bone Sacral Foramina foramina sacralia Pelvis & Hip The sacrum has paired anterior (pelvic) and posterior sacral foramina at four levels (S1-S4). The anterior… Bone Sacral Hiatus hiatus sacralis Pelvis & Hip The sacral hiatus is the caudal opening of the sacral canal, formed by the failure of… Bone Sacral Promontory promontorium ossis sacri Pelvis & Hip The sacral promontory is the anterior projecting edge of the superior surface of the first sacral… Bone Sacrum os sacrum Lower Back The sacrum is formed by five fused sacral vertebrae forming a triangular bone that wedges between… Bone Sacrum (Detail) os sacrum Pelvis & Hip The sacrum is formed by the fusion of five sacral vertebrae, forming the posterior wall of… Bone Sacrum (Full) os sacrum Pelvis & Hip The sacrum is the wedge-shaped fused bone forming the posterior pelvis, articulating with L5 above, the… Bone Scaphoid os scaphoideum Hand & Wrist The scaphoid is the largest proximal carpal bone and the most commonly fractured wrist bone, lying… Bone Scaphoid (Full) os scaphoideum Hand & Wrist The scaphoid bridges the proximal and distal carpal rows, making it the mechanical pivot of wrist… Bone Scaphoid Tubercle tuberculum ossis scaphoidei Hand & Wrist The scaphoid tubercle is a rounded projection on the palmar and radial aspect of the distal… Bone Scaphoid Waist corpus ossis scaphoidei Hand & Wrist The scaphoid waist is the narrowest central portion of the scaphoid bone lying at the mid-carpal… Bone Scapula scapula Shoulder The scapula is a triangular flat bone forming the posterior shoulder girdle, featuring the glenoid cavity… Bone Scapula (Detail) scapula (detail) Shoulder The scapula is a complex flat bone providing the glenohumeral socket, multiple muscle attachments, and the… Bone Second to Twelfth Ribs costae II-XII Chest Ribs 2-12 form the lateral thoracic cage, each with a head (two articular facets for adjacent… Bone Sella Turcica sella turcica Head & Skull The sella turcica is a saddle-shaped depression in the body of the sphenoid bone forming the… Bone Sesamoid Bones (Hand) ossa sesamoidea manus Hand & Wrist The hand has two constant sesamoid bones at the thumb MCP joint — one in the…
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