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Appendicular Skeleton

Appendicular Skeleton. Pectoral Girdle. Clavicle – collarbone Anterior attachment (?) Posterior attachment (?) Scapula – shoulder blades Posterior attachment (?) Spine – divides posterior surface into 2 sections Coracoid process (“Corac” = ?) – curves to clavicle

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Appendicular Skeleton

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  1. Appendicular Skeleton

  2. Pectoral Girdle • Clavicle – collarbone • Anterior attachment (?) • Posterior attachment (?) • Scapula – shoulder blades • Posterior attachment (?) • Spine – divides posterior surface into 2 sections • Coracoid process (“Corac” = ?) – curves to clavicle • Acromion process – forms tip of shoulder • Glenoid cavity (or fossa) – depression that articulates with head of humerus

  3. Upper Limb Humerus Radius Ulna Carpals Metacarpals Phalanges

  4. Humerus Head fits into glenoid cavity of scapula Greater tubercle – lateral process Lesser tubercle – more anterior process Intertubercular groove – narrow furrow “between tubercles” Deltoid tuberosity – v-shaped, rough area where _________ muscles attach to humerus Olecranon fossa – posterior depression that receives an ulnar process when elbow is straightened Coronoid fossa – anterior depression that receives a radial process when elbow is bent

  5. Radius Shorter bone of lower arm Located on thumb side of arm Disc-like head articulates with humeru and with radial notch of the ulna (so your arm can rotate) Radial tuberosity, a process below the head, provides attachment for biceps Styloid process – at distal end; attachment for wrist ligaments

  6. Ulna • Longer than radius • Overlaps distal end of humerus posteriorly • Proximal end has a wrenchlike opening called the trochlear notch (articulates w/humerus) • Oleacronon process – top process • Coronoid process – bottom process • Radial notch – just below trochlear notch • Head – at distal end; articulates with ulnar notch of radius • Styloid process – attachment for wrist ligaments

  7. Label Diagrams

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