S

All anatomy entries starting with "S"

42 entries

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42 entries · Bones

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… Bone Sesamoid Bones of the First MTP ossa sesamoidea hallucis Foot & Ankle The two sesamoid bones of the great toe are embedded in the tendons of the flexor… Bone Sesamoid Bones of the Foot ossa sesamoidea pedis Foot & Ankle The two sesamoid bones of the great toe (medial and lateral sesamoids) are embedded within the… Bone Soleal Line linea musculi solei Lower Leg The soleal line is an oblique ridge on the posterior surface of the proximal tibia, running… Bone Sphenoid Bone os sphenoidale Head & Skull The sphenoid is the central skull base bone articulating with every other cranial bone, making it… Bone Sphenoid Sinus sinus sphenoidalis Head & Skull The sphenoid sinus occupies the body of the sphenoid bone and is divided by an asymmetric… Bone Spine of the Scapula spina scapulae Shoulder The spine of the scapula is the prominent posterior bony ridge crossing the posterior scapular surface,… Bone Spinous Process processus spinosus vertebrae Lower Back The spinous process is the posterior midline projection of each vertebra, serving as the attachment site…

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