Ethmoid bone — localization?
Unpaired, anterior skull base, joins frontal, nasal, sphenoid bones.
Ethmoid bone — parts?
Cribriform plate, perpendicular plate, lateral masses, conchae.
Cribriform plate — role?
Permits olfactory nerve passage via foramina.
Perpendicular plate — function?
Forms superior nasal septum.
Lateral masses — contain?
Ethmoidal air cells and scroll-shaped conchae.
Ethmoidal cells — location?
Within lateral masses; air sinuses.
Ethmoidal conchae — types?
Superior and middle conchae.
Sphenoid bone — location?
Central skull base, behind orbits.
Sphenoid main parts?
Body, lesser wings, greater wings, pterygoid processes.
Sphenoid body — contains?
Sphenoidal sinuses.
Sphenoid wings — functions?
Form anterior boundaries; contain foramina.
Pterygoid processes — features?
Medial/lateral plates, pterygoid notch, fossa.
Sphenoid — articulations?
With all neurocranium bones.
Sphenoid — sella turcica?
Houses pituitary gland.
Temporal bone — location?
Lateral sides of skull, near ear.
Main parts of temporal?
Squamous, mastoid, petrous.
Mastoid process — contains?
Mastoid air cells.
Petrous part — houses?
Inner ear structures.
Temporal — features?
Zygomatic process, mandibular fossa, foramina.
Stylomastoid foramen — transmits?
Facial nerve (CN VII).
Carotid canal — purpose?
Passage for internal carotid artery.
Ethmoid — role in nasal septum?
Forms superior nasal septum.
Ethmoid — role?
Supports nasal septum, transmits olfactory nerves.
Sphenoid — shape?
Butterfly-shaped at skull base.
Temporal — function?
Protects ear, forms skull base.
Cribriform plate — transmits?
Olfactory nerves.
Sella turcica — houses?
Pituitary gland.
Temporal bone parts?
Squamous, mastoid, petrous.
Distinctive feature of sphenoid?
Body with sella turcica.
Answer 17 questions on Crani facial Bones.
1. Which feature of the ethmoid bone enables the passage of the olfactory nerves?
2. What is the primary function of the perpendicular plate of the ethmoid bone?
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