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The Appendicular Skeleton 3 parts The Pectoral (Shoulder) Girdle Composed of two bones Clavicle – Scapula – These bones allow the upper limb to Bones of the Shoulder Girdle Shoulder Girdle is very light because: Bones of the Upper Limb The arm is formed by What type of bone is this? • • The forearm has two bones • • anatomical position radius is ; thumb side of forearm Connected by • The hand – wrist – palm – fingers 3 bones in each finger except for thumb Bones of the Pelvic Girdle (2 coxal bones) Composed of three pair of fused bones – (ilia) connects posteriorly with sacrum – ‘sit down bone’; inferior part of coxal – (pubis) most anterior part Important functions Protects Reproductive organs Urinary bladder Part of the large intestine Hip bones, sacrum and coccyx form the Pubic bones fuse to form the Gender Differences of the Pelvis True versus false pelvis Women True pelvis is larger to be able to allow the infant’s head to pass 1. 2. 3. 4. 5. Bones of the Lower Limbs The thigh has one bone – thigh bone Heaviest and strongest bone in the body Slants medially as it runs downward to bring the knees in line with center of gravity The leg has two bones – shinbone – larger and more medial – smaller and distal end forms the outer part of the ankle at the lateral malleolus Interosseous membrane connects the two bones The foot – ankle Body weight is supported by (heelbone) and – sole – toes; 3 bones on each toe except big toe Arches of the Foot Bones of the foot are arranged to form three strong arches Two longitudinal; medial and lateral One transverse