Appendicular Skeleton – arms, legs, pectoral and pelvic girdles

A. Pectoral Girdle1. Clavicle – collarbone2. Scapula – shoulder blades (triangular)

This girdle is easily dislocated because it is light and allows for exceptionally free movement.

B. Upper limb1. Arm – Humerus – typical long bone.2. Forearm

a. Radius – lateral bone in anatomic position.b. Ulna – medial bone in anatomic position.

3. Hand a. Carpals – 2 rows of 4 bones each

form wrist.b. Metacarpals – form the palm of the

hand.c. Phalanges – form the fingers; 3 bones each.

C. Pelvic Girdle – supports weight of body, attachment for legs.

Coxal bones (2); large and heavy; 3 fused bones:

a. Ilium – large flaring bone.b. Ischium – most inferior part.c. Pubis – anterior part of bone.

How are male and female pelvises different?

1. Bones of female pelvis – lighter and thinner.2. Female ilia are more flared.3. Female inlet is larger for childbirth.

D. Lower Limb1. Thigh – femur – heaviest, strongest bone in the

body. Patella – protects joint between thigh and leg

2. Leg:a. Tibia – shinbone; larger and more medial.b. Fibula – thin and stick-like.

3. Foot – supports the weight of the bodya. Tarsals – heel and ankleb. Metatarsals – sole of foot and archc. Phalanges – toes; each toe has 3

phalanges except for big toewhich has 2