Skeletal System
Appendicular Skeleton


Types of Skeletons
Skeletal Functions
Types of Bones
Structure of Long Bones
Microscopic Structure
Skeletal Development
Axial Skeleton
Appendicular Skeleton
Interactive Skeleton
Diseases, Disorders and Fractures

The Appendicular skeleton is composed of the upper and lower extremities along with the pelvic and shoulder girdles.  In total it contains 126 of the body's 206 total bones.

Shoulder Girdle
    Composed of:
      - Scapula
      - Clavicle
    Connects the upper limbs to the Axial skeleton at only one place - the sternoclavicle articulation

Labeled Bones of the Shoulder Girdle

Upper Limbs
     Composed of:
        - Humerus - forms the upper arm, largest bone above the waist, is a long bone
        - Radius (on thumb side) and Ulna - forms the lower arm, are long bones
        - Carpals - wrist bones, all short bones
        - Metacarpals - bones in the palm of the hand, also short bones
        - Phalanges - bones of the fingers (and toes), also short bones


Pelvic Girdle
    Composed of:
       - Illium - top portion of pelvis, the hip bones, one on each side
       - Ischium - middle portion, one on each side
       - Pubis - most inferior portion, two bones join at pubic symphysis (an amphiarthrotic joint)
    Connects the lower limbs to the axial skeleton


Lower Limbs
     Composed of:
        - Femur - forms upper leg, largest and strongest bone in the body, a long bone
        - Tibia (shinbone) and Fibula - form lower leg, both long bones
        - Patella - forms the kneecap, is a flat bone
        - Tarsals - form the ankle, are short bones
           - Calcaneus - the 'heel' bone, is a large tarsal bone
        - Metatarsals - form the foot, are short bones
        - Phalanges - form the toes (and fingers), are short bones
      The feet are bound by ligaments which form the arches needed for added support and springiness.