Term 1 Exam: Facial bones (from chapter 7 - axial skeleton)

Question 1

What are the fourteen facial bones?

Answer 1

2x nasal
2x maxillae
2x zygomatic
1x mandible
2x lacrimal
2x palatine
2x inferior nasal conchae
1x vomer

Question 2

What are 5 characteristics of the nasal bones?

Answer 2

1. Paired
2. Contains rectangular bone that forms the bridge of the nose
3. Supports the flexible cartilaginous plates (forms framework of the nose)
4. Supports thin muscles of facial expression
5. Common site for facial injuries

Question 3

What are 4 characteristics of the Lacrimal Bones?

Answer 3

1. paired. Smallest bone of the face
2. Form the anterior portion of the medial wall of the eye socket
3. lacrimal groove passes tear duct into the nasal cavity
4. Lacrimal fossa houses the lacrimal gland that produces tear and the lacrimal sac that stores it

Question 4

What are 2 characteristics of the Palatine?

Answer 4

1. paired, L-shaped bones

2. Form the posterior edge of the hard palate, as well as portions of the eye socket and nasal cavity wall and floor

Question 5

What are 3 characteristics of the inferior nasal conchae?

Answer 5

1. separate and not part of the cranial ethmoid bone *distinct from superior and middle nasal conchae
2. All conchae help to swirl and filter air before it enters the lung
3. Only the superior nasal conchae of the cranial ethmoid bone increase the surface area and aid in the sense of smell

Question 6

What are 2 characteristics of the vomer?

Answer 6

1. An unpaired bone
2. Sits on the floor of the nasal cavity
   - extends a bony partition superiorly that meets the meets the perpendicular plate of the ethmoid
   - together, the vomer and ethmoid make up the nasal septum

Question 7

What are four characteristics of the Maxillae?

Answer 7

1. Paired maxillary bones fuse at the midline to form the upper jaw
2. Internally, the maxillae contribute to the inferior wall of the orbit, the walls and the floor of the nasal cavity and most of the hard palate
3. The body of the maxillae are internally hollow to form a pair of large sinuses (maxillary sinuses)
4. Contains body, alveolar process and infraorbital foramen

Question 8

What are four characteristics of the zygomatic bones?

Answer 8

1. Paired
2. These bones form the prominences on the anterior face
3. The temporal process projects posteriorly and articulates with the zygomatic process of the temporal bone to form the zygomatic arch
4. zygomatic foramen passes zygomaticofical nerve and blood vessels

Question 9

What are two characteristics of the mandible?

Answer 9

1. arched bone - largest and strongest bone - forms lower jaw
2. The only movable bone of the facial bones

Question 10

What are 7 structural features of the mandible?

Answer 10

1. body
2. rami
3. angle
4. condylar process - mandibular fossa of temporal bone (tmj)
5. coronoid process - temporalis muscle
6. Mandibular notch
7. mental foramen (chin)