The Skeletal System (Axial) Pt. 1

Question 1

How many bones structure the axial skeleton?

Answer 1

Structured from 80 bones

Question 2

What does the axial skeleton form?

Answer 2

Forms the long axis of the body

Question 3

What bones are included in the axial skeleton? (3)

Answer 3

• Bones of the skull
• Vertebral column
• Rib cage

Question 4

What are sutures?

Answer 4

Interlocking joints that firmly unite all the bones of the adult skull

Question 5

What kind of appearance do suture lines have? (2)

Answer 5

Have a sawtooth or serrated appearance

Question 6

What are the four major skull sutures? (4)

Answer 6

• Coronal
• Sagittal
• Squamous
• Lambdoid

Question 7

What does the frontal bone form? (first 2)

Answer 7

• Forehead
• Bony projections under the eyebrows
• Superior part of each eye’s orbit

Question 8

What does the frontal bone form around the eye?

Answer 8

The superior part of each eye’s orbit

Question 9

What does foramen magnum mean?

Answer 9

Means large hole

Question 10

Where is the foramen magnum found?

Answer 10

The base of the occipital bone

Question 11

What does the foramen magnum surround?

Answer 11

Surrounds the lower part of the brain

Question 12

What does the foramen magnum allow for with the brain?

Answer 12

Allows the spinal cord to connect with the brain

Question 13

What are occipital condyles and where are they found?

Answer 13

Rocker-like and lateral to (on each side of) the foramen

Question 14

Where do the occipital condyles rest?

Answer 14

Rest on the first vertebra of the spinal column (atlas)

Question 15

What kind of shape does a sphenoid bone have? What does it span? (2)

Answer 15

• Has a butterfly shape
• Spans the width of the skull

Question 16

What does the sphenoid bone form?

Answer 16

Forms part of the floor of the cranial cavity

Question 17

What does sella turcica mean?

Answer 17

Turk’s saddle

Question 18

What is the sella turcica? What is it in the middle of?

Answer 18

A small depression in the middle of the sphenoid bone

Question 19

What is held in place at the sella turcica?

Answer 19

The pituitary gland is held in place there

Question 20

What is the crista galli Latin for?

Answer 20

Latin for cock’s comb

Question 21

Where does the crista galli project from?

Answer 21

Projects from its superior surface

Question 22

What attaches to the crista galli?

Answer 22

The outer most covering of the brain attaches to this projection

Question 23

What are cribriform plates?

Answer 23

The small holes on each side of the crista galli

Question 24

What do the cribriform plates allow for?

Answer 24

Allow nerve fibers carrying impulses from the olfactory (smell) receptors of the nose to reach the brain

Question 25

How many bones comprise the facial bones?

Answer 25

14 bones that comprise the facial bones

Question 26

How many facial bones are paired?

Answer 26

12 bones are paired

Question 27

What are the two singles bones of the face? (2)

Answer 27

- Mandible - Vomer

Question 28

What are the mandible and vomer?

Answer 28

Two single bones of the face

Question 29

What is another name for maxillae?

Answer 29

Maxillary bones

Question 30

What is another name for maxillary bones?

Answer 30

Maxillae

Question 31

What fuses to form forms the upper jaw?

Answer 31

The two maxillae (maxillary bones) fuse to form the upper jaw

Question 32

What do the two maxillae fuse to form?

Answer 32

Fuse to form the upper jaw

Question 33

What is maxillae (maxillary bones)?

Answer 33

The main bones of the face

Question 34

What do the maxillae (maxillary bones) carry and where? (2)

Answer 34

- Carry the upper teeth - In the alveolar margin

Question 35

Where do the paired palatine bones lie and next to what?

Answer 35

The paired palatine bones lie posterior to the palatine processes of the maxillae

Question 36

What do the palatine bones form?

Answer 36

Form the posterior part of the hard palate

Question 37

What causes a cleft palate?

Answer 37

Failure of palatine bones or the palatine processes to fuse medially

Question 38

What are the nasal bones? What do they form?

Answer 38

Small rectangular bones that form the bridge of the nose

Question 39

What is the inferior conchae? What do they project from?

Answer 39

Thin curved bones projecting from the lateral walls of the nasal cavity

Question 40

What is the inferior conchae part of?

Answer 40

Part of the ethmoid bone

Question 41

What is the hyoid bone not part of?

Answer 41

Not part of the skull

Question 42

What is the hyoid bone closely related to?

Answer 42

Closely related to the mandible and temporal bones

Question 43

What doesn't the hyoid bone do?

Answer 43

Doesn't articulate directly with any other bone