Axial Skeleton - Skull

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Slideshow of the bones of the Skull, part of the Axial Skeleton

Transcript of Axial Skeleton - Skull

  • 1.Axial Skeleton

2. TheSkull
Two parts of the skull:
The cranium encloses and protects the brain
The facialbones hold the eyes and face shape
3. TheSkull - Cranium
Eight large flat bones fused together (sutures):
Frontal forms forehead
Parietal superior and lateral walls (paired)
Temporal inferior to parietal, at temples (paired)
Occipital posterior wall
Sphenoid deep to the anterior of skull, forms floor of cranial cavity
Ethmoid forms roof of nasal cavity, medial walls of orbits
4. The Skull - Cranium
5. The Skull - Cranium
6. The Skull - Cranium
7. The Skull - Cranium
8. The Skull - Cranium
9. The Skull - Cranium
10. The Skull - Face
Thirteen bones fused together, with one connected by joints
Maxillae forms upper jaw (paired)
Palatine posterior to maxillae, between back molars (paired)
Zygomatic cheekbones, lateral walls of orbits (paired)
Lacrimal part of medial walls of orbits, between ethmoid bones and maxillae (paired)
11. The Skull - Face
Nasal bridge of nose (paired)
Vomer median line of nasal cavity
Inferiorconchae bone projections from lateral wall of nasal cavity (paired)
Mandible lower jaw, connected by only freely movable joint of face
12. The Skull - Face
13. The Skull - Face
14. The Skull - Face
15. The Skull - Face
16. The Skull - Face
17. The Skull - Face
18. The Skull - Face
19. The Skull - Face
20. The Skull
Hyoid Bone
Not technically part of skull
Does not articulate directly with any other bone
Anchored to temporal bones by ligaments
Movable base for tongue
Attachment point for neck muscles
21. The Skull
22. The Skull Bone Markings
Bone Markings
Meatus canal-like passageway
External Auditory Meatus canal leads to eardrum and middle ear (temporal)
Process bony prominence
Styloid Process inferior to auditory meatus (temporal)
Zygomatic Process anterior to cheek bone (temporal)
Mastoid Process posterior and inferior to auditory meatus (temporal)
Palatine Processes extensions of maxillae that form the anterior part of the mouth (maxillae)
23. The Skull Bone Markings
Foramen opening through bone
Jugular Magnum at junction of occipital & temporal bones, opening for jugular vein (temporal)
Carotid Canal anterior to jugular foramen, opening for carotid artery (temporal)
Foramen Magnum opening for spinal cord to connect to brain (occipital)
Foramen Ovale opening for nerve fibers to pass to jaw muscles (sphenoid)
Condyle rounded articular projections (involved with joints)
Occipital Condyles rest on the first vertebra of the spinal column (occipital)
Sinuses cavities in bone filled with air
Paranasal Sinuses found in different bones surrounding nasal cavity (frontal, ethmoid, sphenoid, maxillae)
24. The Skull Bone Markings
25. The Skull Bone Markings
26. The Skull Bone Markings