biology 223 human anatomy for biology majors week 8; lecture 1; monday dr. stuart s. sumida
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Biology 223 Human Anatomy for Biology Majors Week 8; Lecture 1; Monday Dr. Stuart S. Sumida. Overview of Structure of the Adult Skull. The developing skull has three component origins: Condrocranium (base of skull / braincase) Dermatocranium (flat bones of skull) - PowerPoint PPT PresentationTRANSCRIPT
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Biology 223Human Anatomy for Biology MajorsWeek 8; Lecture 1; MondayDr. Stuart S. Sumida
Overview of Structure of the Adult Skull
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The developing skull has three component origins:
•Condrocranium (base of skull / braincase)
•Dermatocranium (flat bones of skull)
•Splanchnocranium (bones derived from gill arch elements)
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Mode of Germ Layer Formation Origin
Condrocranium Endochondral Mesoderm
Dermatocranium Dermal Neural Crest
Splanchnocranium Endochondral Neural Crest
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CHONDROCRANIUM: Bones of the base of the skull.
•Most major cranial nerves escape the skull through these.•Endochondral•Mesodermal•Include: ethmoid, sphenoid (part), occipital (part) right and left temporal (parts).
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Flat bones of skull: DERMATOCRANIUM (These and others.)
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Gill slit bones: become SPLANCHNOCRANIUM
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Mandible(Lower Jaw)
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Skull – Anterior View
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Frontal
Anterior
Inferior
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Ethmoid
superior lateral
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Bones of the Orbit
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Skull – Lateral View
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Maxilla: Lateral View
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Parietal
External
Internal
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External
Internal
Temporal
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Neonatal Temporal Bone
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Skull – Superior View
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Skull – Posterior View
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Occipital
Inferior
Internal
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Skull – Inferior View
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Hard Palate
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Infratemporal Region
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Skull – Internal View
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Sphenoid
Occipital
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Major Ligaments Near Jaw Joint
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Major Ligaments Near Jaw Joint:
Stylomandibular
Sphenomandibular
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Bones of the Basicranium
EthmoidSphenoidTemporalOccipital
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Sphenoid
Anterior
Posterior
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Dermal Roofing Bones
NasalsFrontal
Parietals
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Dermal Facial Bones
MaxillaZygomaticLacrimal
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Maxilla: Lateral View
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Bones of the Orbit
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Dermal Palatal Bones
MaxillaPalatineVomer
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Hard Palate
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Bones of Splanchnopleure
Sphenoid Greater WingTemporal Styloid Process
Middle Ear Ossicles
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Middle Ear Ossicles
MalleusIncus
Stapes
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Malleus
Incus
Stapes
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