The skeletal system: the appendicular skeleton. The Pectoral Girdle (Shoulder). 2 pectoral girdles attach bones of upper limbs to axial skeleton each: 1 clavicle 1 scapula. Clavicle . S-shaped, (medial ½ convex anteriorly , lateral ½ concave anteriorly ) slender bone
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lateral edge: acromion a flattened expanded process, easily felt as hi pt of shoulder (tailors use it as landmark to measure length of arm)
larger, medial, weight-bearing bone of lower leg
proximally articulates with femur & fibula
distally articulates with fibula & tarsals
fully developed by age 12 - 13