EXAM #3 (FACIAL BONES + ORBITS)

Question 1

[*] What are the 14 facial bones?

Answer 1

R and L nasal

R and L lacrimal

R and L maxillary

R and L zygomatic

R and L palatine

R and L inferior nasal conchae

Vomer

Mandible

Question 2

[Nasal Bones ]

Two _____, _____ bones

Vary in size and shape in individuals

Form _____ bony wall of nasal cavity

Commonly called “_____ of _____”

Answer 2

[Nasal Bones]

Two small, thin bones

Vary in size and shape in individuals

Form superior bony wall of nasal cavity

Commonly called “bridge of nose”

Question 3

[Lacrimal Bones ]

• The two _____ bones in the skull

Located in anterior part of _____ wall of orbits between labyrinth of _____ and _____

• Each bone contains a lacrimal foramen through which the _____ passes

Articulations:

4?

Answer 3

[Lacrimal Bones]

• The two smallest bones in the skull

Located in anterior part of medial wall of orbits between labyrinth of ethmoid and maxilla

• Each bone contains a lacrimal foramen through which the tear duct passes

Articulations:
Frontal 
Ethmoid
Maxilla
Inferior nasal concha

Question 4

[Maxillary Bones ]

_____ immovable bones of face

Each articulates with all other facial bones, except for _____

Also articulate with _____ and _____ cranial bones

Form part of _____ walls and most of _____ of nasal cavity

Form part of _____ of orbit

Answer 4

[Maxillary Bones]

Largest immovable bones of face

Each articulates with all other facial bones, except for mandible

Also articulate with frontal and ethmoid cranial bones

Form part of lateral walls and most of floor of nasal cavity

Form part of floor of orbit

Question 5

[Maxillary Bones ]

Form three fourths of _____ of mouth

Have _____ process that articulate with zygoma to form part of cheek

Body contains large, pyramidal cavity = _____

_____ = located under each orbit for passage of infraorbital nerve and artery

Answer 5

[Maxillary Bones]

Form three fourths of roof of mouth

Have zygomatic process that articulate with zygoma to form part of cheek

Body contains large, pyramidal cavity = maxillary sinus

Infraorbital foramen = located under each orbit for passage of infraorbital nerve and artery

Question 6

[Maxillary Bones ]

_____ = inferior borders of spongy bone that support roots of teeth

_____ = forward, pointed process at their midline junction

_____ = midpoint of this junction (of anterior nasal spine)

Answer 6

[Maxillary Bones]

Alveolar process = inferior borders of spongy bone that support roots of teeth

Anterior nasal spine = forward, pointed process at their midline junction

Acanthion = midpoint of this junction (of anterior nasal spine)

Question 7

[Zygomatic Bones ]

Form prominence of _____

Form part of _____ wall and _____ of orbits

Temporal process extends posteriorly to join zygomatic process of _____ bone

_____ = formed by union of temporal process of zygoma and zygomatic process of temporal bone

Answer 7

[Zygomatic Bones]

Form prominence of cheeks

Form part of side wall and floor of orbits

Temporal process extends posteriorly to join zygomatic process of temporal bone

Zygomatic arch = formed by union of temporal process of zygoma and zygomatic process of temporal bone

Question 8

[Zygomatic Bones ]

Articulations:

_____ = frontal bone

_____ = zygomatic process of temporal bone

_____ = maxilla

_____ = sphenoid

Answer 8

[Zygomatic Bones]

Articulations:

Superior = frontal bone

Lateral = zygomatic process of temporal bone

Anterior = maxilla

Posterior = sphenoid

Question 9

[Palatine Bones ]

Two __-shaped bones composed of vertical and horizontal plates

Horizontal plates articulate with _____ to complete the posterior fourth of bony palate (roof of mouth)

Vertical portions extend upward between _____ and pterygoid processes of _____ in posterior nasal cavity

Answer 9

[Palatine Bones]

Two L-shaped bones composed of vertical and horizontal plates

Horizontal plates articulate with maxillae to complete the posterior fourth of bony palate (roof of mouth)

Vertical portions extend upward between maxillae and pterygoid processes of sphenoid in posterior nasal cavity

Question 10

[Palatine Bones ]

Superior tips of vertical plates assist in forming _____ orbit.

Answer 10

[Palatine Bones]

Superior tips of vertical plates assist in forming posteromedial orbit.

Question 11

[Inferior Nasal Conchae ]

Extend _____ and _____ from lateral walls of nasal cavity at its lower third

Long, narrow, very thin bones with a lateral curl

• Gives _____-like appearance

Upper two nasal conchae are processes of _____ bone

Answer 11

[Inferior Nasal Conchae]

Extend diagonally and inferiorly from lateral walls of nasal cavity at its lower third

Long, narrow, very thin bones with a lateral curl

• Gives scroll-like appearance

Upper two nasal conchae are processes of ethmoid bone

Question 12

[Vomer ]

Thin plate of bone situated in _____ of floor of nasal cavity

Forms _____ nasal septum

Superior border articulates with body of _____ bone

Superior part of anterior border articulates with perpendicular plate of _____ bone

Posterior border is _____

Answer 12

[Vomer]

Thin plate of bone situated in MSP of floor of nasal cavity

Forms inferior nasal septum

Superior border articulates with body of sphenoid bone

Superior part of anterior border articulates with perpendicular plate of ethmoid bone

Posterior border is free

Question 13

[Mandible ]

_____ and _____ bone of the face

_____ = curved horizontal portion

_____ = two vertical portions on each side of body

_____ = junction of body and ramus

• Also called _____

_____ = anterior, triangular prominence

Answer 13

[Mandible]

Largest and densest bone of the face

Body = curved horizontal portion

Rami = two vertical portions on each side of body

Angle of mandible = junction of body and ramus

• Also called gonion

Mental protuberance = anterior, triangular prominence

Question 14

[Mandible ]

_____ = most anterior and central part where left and right halves of mandible fuse

_____ = superior border of body; consists of spongy bone that supports roots of teeth

_____ = small openings on each side below the second premolar; transmit nerves and blood vessels

Answer 14

[Mandible]

Symphysis = most anterior and central part where left and right halves of mandible fuse

Alveolar process = superior border of body; consists of spongy bone that supports roots of teeth

Mental foramina = small openings on each side below the second premolar; transmit nerves and blood vessels

Question 15

[Mandible ]

_____ = anterior process on top of ramus

_____ = posterior process on top of ramus; articulates with mandibular fossa of temporal bone to form temporomandibular joint (TMJ)

_____ = concave area at top of ramus between coronoid and condylar processes

Answer 15

[Mandible]

Coronoid process = anterior process on top of ramus

Condylar process = posterior process on top of ramus; articulates with mandibular fossa of temporal bone to form temporomandibular joint (TMJ)

Mandibular notch = concave area at top of ramus between coronoid and condylar processes

Question 16

[Hyoid Bone ]

Small __-shaped bone situated at the base of the tongue

Accessory bone of axial skeleton – not a _____ or _____ bone

Only bone in the body that does not _____ with another bone

Not a _____ bone

Answer 16

[Hyoid Bone]

Small U-shaped bone situated at the base of the tongue

Accessory bone of axial skeleton – not a facial or cranial bone

Only bone in the body that does not articulate with another bone

Not a facial bone

Question 17

[Orbits ]

Each is composed of seven bones:

7?

Answer 17

[Orbits]

Each is composed of seven bones:

Frontal 
Sphenoid
Ethmoid
Maxilla
Zygoma
Lacrimal
Palatine

Question 18

[Nasal Bones]

Articulations:

With each other in _____ plane

_____ = frontal bone

_____ = perpendicular plate of ethmoid bone

On each lateral side = _____

Answer 18

[Nasal Bones]

Articulations:

With each other in midsagittal plane

Superior = frontal bone

Posterosuperior = perpendicular plate of ethmoid bone

On each lateral side = maxillae