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Major content provider: U.S. National Cancer Institute

Divisions of the Skeleton

The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum. The appendicular skeleton consists of 126 bones and includes the free appendages and their attachments to the axial skeleton. The free appendages are the upper and lower extremities, or limbs, and their attachments which are called girdles. The named bones of the body are listed below by category.


Axial Skeleton (80 bones)

Skull (28)

Cranial Boneshuman01_91.jpg (30256 bytes)
  • Parietal (2)
  • Temporal (2)
  • Frontal (1)
  • Occipital (1)
  • Ethmoid (1)
  • Sphenoid (1)
human01_92.jpg (34419 bytes)Facial Bones
  • Maxilla (2)
  • Zygomatic (2)
  • Mandible (1)
  • Nasal (2)
  • Platine (2)
  • Inferior nasal concha (2)
  • Lacrimal (2)
  • Vomer (1)
human01_93.jpg (21337 bytes)Auditory Ossicles
  • Malleus (2)
  • Incus (2)
  • Stapes (2)

Hyoid (1)

human01_94.jpg (36347 bytes)Vetebral Column

  • Cervical vertebrae (7)
  • Thoracic vertebrae (12)
  • Lumbar vertebrae (5)
  • Sacrum (1)
  • Coccyx (1)

Thoracic Cagehuman01_95.jpg (38690 bytes)

  • Sternum (1)
  • Ribs (24)

Appendicular Skeleton (126 bones)

Pectoral girdleshuman01_96.jpg (30093 bytes)

  • Clavicle (2)
  • Scapula (2)

Upper Extremity human01_97.jpg (29497 bytes)

  • Humerus (2)
  • Radius (2)
  • Ulna (2)
  • Carpals (16)
  • Metacarpals (10)
  • Phalanges (28)

Pelvic Girdlehuman01_98.jpg (25546 bytes)

  • Coxal, innominate, or hip bones (2)

Lower Extremityhuman01_99.jpg (23017 bytes)

  • Femur (2)
  • Tibia (2)
  • Fibula (2)
  • Patella (2)
  • Tarsals (14)
  • Metatarsals (10)
  • Phalanges (28)

 

David L. Heiserman, Editor

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Revised: June 06, 2015