A&P Lab Practical 3: Axial Skeleton - Ch. 8 & 9

*NOT DONE and figure out all chapters Wil be ch 9, 8, and ??

What is the axial skeleton? What are the parts of the axial skeleton?

• Axial Skeleton → Forms central vertical axis of the body; 80 bones

• Made up of three main components: Skull, vertebral column, and thoracic cage

• Appendicular Skeleton → Includes the limbs and their attachments / “The appendages”; 126 bones

What bones make up the skull?

• 22 total bones make up the skull of an adult human:

• 8 cranial bones that make up the bony skull / the back of the skull

• 14 facial bones that make up the front of the skull

What are the cranial bones?

8 Cranial Bones:

1. Frontal

2. Parietal (2 parietal bones - left and right)

3. Occipital

4. Temporal (2 temporal bones - left and right)

5. Sphenoid

6. Ethmoid

*We do not need to be able to identify whether a bone was taken from the left or right side for the practical.

Label: Frontal bone

Label: Frontal bone

• Cranial bone

• Think: Forehead

Label: Parietal bone (2)

Label: Occipital bone

Label: Temporal bone (2)

Label: Sphenoid

• single, wedge- and butterfly-shaped bone located at the center of the skull base, connecting the neurocranium to the facial skeleton

Label: Ethmoid

Label: Crita Galli

Label: Crita Galli on kull

Shark fin bone in nose (bone)

Label: Perpendicular Plate

Sharp bone in nasal plate

*not done