Axial skeleton parts 1 2

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  • 1. Organization of the Skeleton
    • Axial Skeleton
  • Appendicular Skeleton

Axial Skeleton is the blue Appendicular Skeleton is the purple 2. Axial Skeleton Theaxial skeleton is composed of theskull ,vertebral column , andthoracic cage . Each of these is essentially a shaped box whichhouse andprotectthe most vital and vulnerable organs of the human body , such as the brain, spinal cord, and the heart, lungs, and kidneys. 3. The Skull consists of29 bonesand can be subdivided intofiveareas: Part One 4. Five Subdivisions of the Skull:

  • Cranium (8)
  • Facial Bones (14)
  • Hyoid Bone(1)
  • Ossicles of the Ear (6)
  • Wormian Bones (?)

5. Skull Subdivision One

  • The Cranium

6. The Cranium(a.k.a. the braincase)Thecraniumconsists ofeight(8) bones and is specifically defined asthe rounded, bony case enclosing and protecting the brain . The cranium also functions as anattachment surface for important groups of muscles , and in theformation of the sinuses , which serve asresonance chambers and help to reduce the total weight of the skull . 7. The bones of thecraniumare as follows:

  • the forehead
  • 1.Frontal Bone (1)

8. The bones of thecraniumare as follows:

  • top & sides of the head
  • 2.Parietal Bones (2)

9. The bones of thecraniumare as follows:

  • the back of the head
  • 3.Occipital Bone (1)

10. The bones of thecraniumare as follows:

  • the temples
  • 4.Temporal Bones (2)

11.

  • back of the eye socket ,anterior temples&base of cranium
  • Sphenoid Bone (1)

The bones of thecraniumare as follows: 12. The bones of thecraniumare as follows:

  • the ?
  • Ethmoid Bone (1)

13. Summary of the Cranial Bones

  • Bones of thecranium :
  • Frontal Bone (1)
  • Parietal bones (2)
  • Occipital bone (1)
  • Temporal bones (2)
  • Sphenoid bone (1)
  • Ethmoid bone (1)

14. Skull Subdivision Two

  • The Facial Bones

15. The Facial Bones (a.k.a. the Face)

  • Thefacial bonesconsist of 14 bones that compose what is known as the human face. Along with the cranial bones, they help toform the nasal cavityand alsoprovide numerous attachment sites for important musclesthat control facial expressions and move the jaw.

16. The bones ofthe faceare as follows:

  • 1.Nasal bones(2)bridge of the nose

17. The bones ofthe faceare as follows:

  • 2.Maxillary bones or Maxillae (2)anterior portion of the roof of mouth & upper jaw

*Note: Maxillae are also the anterior, medial portion of the eye socket 18. The bones ofthe faceare as follows:

  • 3.Zygomatic bones (2)cheek bones

19. The bones ofthe faceare as follows:

  • 4.Mandible (1)jaw bone or lower jaw

20. The bones ofthe faceare as follows:

  • 5.Lacrimal bones (2)medial part of the eye socket

21. The bones ofthe faceare as follows:

  • 6.Palatine bones (2)posterior portion of theroof of mouth& base of theeye socket

22. The bones ofthe faceare as follows:

  • 7.Inferior nasalconchae(2)nasal cavity baffles

23. The bones ofthe faceare as follows:

  • 8.Vomer bone (1)

24. Summary of the Facial Bones

  • Nasal
  • Zygomatic
  • Maxilla
  • Mandible
  • Lacrimal
  • Palatine
  • Inferior Nasal Conchae
  • Vomer

Bones of theface :