O4-- Bones and Articulations of skull
04- Bones and Articulations of skull
Functions:protecting and supporting of the brain & the organs of sight, hearingand balance, the upper part of digestive and respiratory systems.Two sets of bones:1.Cerebralcranium: enclosesthebrain2.Facial cranium: forms the bony framework of the face,the orbits,the nasal cavity.roof & lateral wall of the mouth
Functions: protecting and supporting of the brain & the organs of sight, hearing and balance, the upper part of digestive and respiratory systems. 1. Cerebral cranium：encloses the brain Two sets of bones: 2. Facial cranium：forms the bony framework of the face, the orbits, the nasal cavity, roof & lateral wall of the mouth
I . The skullI）Cerebralcranium(8bones6.Paried bones :①Parietal boneMastoidprocess②Temporal bone:Unpaired bones:③Frontal bone①Sphenoidbone③Ethmoidbone@Occipitalbone
• Unpaired bones: ③ Frontal bone ④ Sphenoid bone ⑤ Ethmoid bone ⑥ Occipital bone • Paried bones : ① Parietal bone ② Temporal bone Ⅰ）Cerebral cranium (8 bones) Ⅰ. The skull ② ① Mastoid process ③ ⑥
Frontalbone·in the anterosuperior part of the skull(1)·FrontalsinusEthmoidbone·Bonynasalcavity
Frontal bone • in the anterosuperior part of the skull • Frontal sinus ① ① Ethmoid bone • Bony nasal cavity
Occipitalbone·in the posteroinferior part of the skull1·ForamenmagnumMedulla oblongataSpinalcordForamenmagnum
Foramen magnum Occipital bone • in the posteroinferior part of the skull • Foramen magnum ① Spinal cord Medulla oblongata