Chapter 6 - Skull and Axial skeleton

Axial Skeleton

Functions as a framework that supports and protects organs in the dorsal and ventral body cavities

Attachment sites for muscles:

• Adjust the posture of the head, neck, and trunk

• Move the thoracic cage for respiration

• Stabilize the appendicular skeleton

How many bones are in an adult body?

206

What do skull bones separate into (categories)?

Cranial and facial 

How many cranial bones are there?

8 cranial bones

How many facial bones are there?

14

What are the associated bones to the skull?

Auditory ossicles and hyoid

How many bones are in the axial skeleton?

80 bones

How many ribs are there?

24

How many vertebrae are there?

24

What is special about the hyoid bone?

It is the “floating” bone of the body and the only bone that does not directly articulate with any other boneW

What does injury to the hyoid bone cause?

Not being able to swallow, breathe, or speak with this injury that is most common with manual choking

What type of cartilage attaches ribs to the sternum? Not R11 or 12

Hyaline cartilage

What are intervertebral discs made out of?

Fibrocartilage

Where are there no intervertebral discs found in the vertebrae?

Between C1 (atlas) and C2 (axis) or between the sacrum and coccyx

Is the frontal lobe paired?

No, the frontal lobe is not paired because it fused together as adults and not in children

What pairs always have another one?

Internal/external

Interior/superior

Major/minor