<P> The appendicular skeleton forms during development from cartilage, by the process of endochondral ossification . </P> <P> The appendicular skeleton is divided into six major regions: </P> <Ol> <Li> Pectoral girdles (4 bones) - Left and right clavicle (2) and scapula (2). </Li> <Li> Arms and forearms (6 bones) - Left and right humerus (2) (arm), ulna (2) and radius (2) (forearm). </Li> <Li> Hands (54 bones) - Left and right carpals (16) (wrist), metacarpals (10), proximal phalanges (10), intermediate phalanges (8) and distal phalanges (10). </Li> <Li> Pelvis (2 bones) - Left and right hip bone (2). </Li> <Li> Thighs and legs (8 bones) - Left and right femur (2) (thigh), patella (2) (knee), tibia (2) and fibula (2) (leg). </Li> <Li> Feet and ankles (52 bones) - Left and right tarsals (14) (ankle), metatarsals (10), proximal phalanges (10), intermediate phalanges (8) and distal phalanges (10). </Li> </Ol> <Li> Pectoral girdles (4 bones) - Left and right clavicle (2) and scapula (2). </Li>

Which class of bones are part of the appendicular skeletal division
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