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Appendicular Skeleton

Appendicular Skeleton. Day 1 Shoulder Girdle. Appen….WHAT? Appendicular skeleton: refers to the bones that make up our arms and legs. These include: The shoulder girdle, the pelvic girdle, and the extremities of the arm and the leg. Shoulder Girdle.

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Appendicular Skeleton

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  1. Appendicular Skeleton Day 1 Shoulder Girdle

  2. Appen….WHAT? • Appendicular skeleton: refers to the bones that make up our arms and legs. • These include: The shoulder girdle, the pelvic girdle, and the extremities of the arm and the leg.

  3. Shoulder Girdle • The shoulder girdle (pectoral girdle) consists of • The clavicle (collar bone) • The scapula (the shoulder blade) • The clavicle: S shaped bone that articulates (connects) with the sternum medially and the acromion process of the scapula laterally. Simply, it connects the sternum to the scapula. • The scapula: flat with a ridge almost pergendicular to the flat plain. • It does not articulate with the axial skeleton but is held in place by muscles. Gives more mobility.

  4. Parts of the scapula: • Glenoid Cavity: articulates with the head of the humerus. • Coracoid Process: Projects anteriorly to articulate with the clavicle. • Acromion Process: Projects posteriorly to articulate with the clavicle. • Spine: The ridge on the posterior surface • Vertebral margin: The medial edge that is closest to the ribs. • Scapular notch: A small dip in the bone on the superior aspect. • Superior margin: The upper most edge. • Axillary margin: Margin closest to the arm pit. • See http://www.personal.psu.edu/jas43/skel/scapula2.htm • For a diagram and self quiz

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