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Chapter 7

Bones of the Skull

QuestionAnswer
Supraorbital foramen Frontal Bone
Glabella smooth area between eyes, frontal bone
sagittal suture connects parietal bone
coronal suture connects frontal and parietal bones
squamous suture connects temporal and parietal bones
zygomatic process joins zygomatic and temporal bones
Mandibular fossa rounded depression in temporal bone creating socket for mandibular condyle
External acoustic meatus Temporal bone, canal leading to eardrum and middle ear
Styloid process needlelike projection in temporal bone
Mastoid process rough projection under external acoustic meatus attachment for muscles
Foramen Magnum Occipital bone opening for spinal column
forms floor and back wall of skull Occipital
articulates occipital and parietal bones lambdoid suture
Occipital condyles rounded projections latel to foramen magnum that connects first cervical vertebra
Bat shaped bone Sphenoid
Sphenoid Bone importance joins all other bones in cranium and most facial bones
Keystone bone of skull sphenoid
Portions of the sphenoid seen exteriorly greater wings
Saddle shaped region in sphenoid midline nearly encloses the pituitary gland Sella Turcica
portion of the sella turcica where the pituitary gland sits in sphenoid bone hypophyseal fossa
Pterygoid processes in greater wing of sphenoid bone Anchor the pterygoid muscles, important for chewing, passage of tongue
Long slit between greater and lesser wings of sphenoid bone allows nerves to control eye movements superior orbital fissure
Irregularly shaped bone between sphenoid and nasal bones, behind bridge of nose Ethmoid Bone
Vertical projection providing attachment of brain in Ethmoid bone Crista Galli
Bony plates lateral to crista galli lets olfactory fibers pass for smell in Ethmoid bone Cribriform plates
Crista Galli and Cribriform plates form what? Horizontal Plate of the ethmoid bone
Top of nasal septum in ethmoid bone perpendicular plate
Thin walled bony regions in ethmoid bone flanking the perpendicular plate Lateral mass riddles with ethmoid sinuses
extension of ethnoid bone increasing surface area to warm cool air Superior and middle conchae
8 Cranial Bones 2 Parietal 2 Temporal 1 Frontal 1 Occipital 1 Sphenoid 1 Ethmoid
14 Facial Bones 1 Mandible 2 Zygomatic 2 Maxilla 2 Lacrimal 2 Nasal 1 Vomer 2 Inferior chonchae 2 Palatine
Houses lower teeth, mental foramen Mandible
Mandibular condyles fit into the mandibular fossa of what bone temporal bone
Connects mandible with muscles behind zygotic process coronid process
The only joint not joined by sutures temporomandibular joint
contains sockets for teeth alveolar margin
All facial bones except the mandible, join what bone Maxilla
Opening under the orbit infraorbital foramen
floor of nasal cavity and roof of mouth is what bone maxilla
Cheekbone zygomatic
zygomaticofacial foramen openings in the zygomatic bone
Medial walls of each orbit. Articulate with frontal, ethmoid and maxillae bones lacrimal bone
lacrimal fossa houses lacrimal sac passageway for tears
bone that houses tears lacrimal
Rectangular bones forming the bridge of the nose Nasal bone
joins with frontal bone and does not form eye socket nasal
Small bones projecting upwards lower part of nasal septum Vomer
Increases surface area of nasal cavity on either side of Vomer Inferior Chonchae
Looks like the letter L attached to maxilla and has horizontal and perpendicular plates the perp plates are part of nasal cavity and orbits Palatine Bones
Not connected to another bone is in the throat above larynz Hyoid Bone
Provides passage of tongue in Sphenoid bone pterygoid process
Created by: Priscilla.Beck
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