chapter 7 Axial Skelton

Question 1

what makes the lateral nasal cavities

Answer 1

lacrimal, inferior nasal conchae, ethmoid , maxilla

Question 1

what makes the superior nasal cavities

Answer 1

Frontal bone, sphenoid, and ethmoid

Question 2

defn the paranasal sinuses

Answer 2

Air-filled chambers connected to nasal cavities
Lighten skull bones
Contain mucous epithelium
Releases mucus into nasal cavities

Question 3

what are the 4 paranasal sinus

Answer 3

frontal, ethmoidal, sphenoidal, maxilla

Question 4

what are the 7 bones that make up the orbit bone

Answer 4

Frontal bone (roof)
Maxilla (floor)

Maxilla, lacrimal bone, and ethmoidal labyrinth (orbital rim and medial wall)

Sphenoid and palatine bones

Zygomatic bone (lateral wall and rim of orbit)

Question 5

what is the primary curve

Answer 5

Called primary curves (accommodation curves)

Present during fetal development
Accommodate internal organs

Question 6

what is the secondary curve

Answer 6

Cervical and lumbar curves

Called secondary curves (compensation curves)

Appear after birth
Shift body weight to permit upright posture

Question 7

name the features of the cervical

Answer 7

C1 to C7
Small body (support only head)

Large vertebral foramen (largest part of spinal cord)

Concave superior surface

Anterior edge is inferior to posterior edge

Question 8

name the features of the atlas c1

Answer 8

Articulates with occipital condyles of skull

Has no body or spinous process

Has a large, round vertebral foramen within anterior and posterior arches

Question 9

the function of the axis c2

Answer 9

Articulates with the atlas

Has heavy spinous process to attach muscles of head and neck

Bodies of axis and atlas fuse during development to form the dens