Axial Skeleton (Spine, Ribs, Skull)

Lab 4, Chapter 7

What is the Vertebral Column made up of?

Vertebrae, Sacrum, Coccyx

How many types of each vertebra are there?

7 Cervical, 12 Thoracic, 5 Lumbar

7 Cervical Vertebrae

Smallest Vertebrae, Holes on either side, Spikes on the back

Two cervical vertebrae that have specific names

Atlas (C1) and Axis (C2)

Atlas has no what?

Spinous Process or Body

Skull sits on top of where?

Atlas

Atlas sits on top of where?

Axis

12 Thoracic Vertebrae

“Giraffe” Shaped, Long Spinous Process, Costal Facets

5 Lumbar Vertebrae

“Moose” Shaped, Largest, Blunt Spinous Process

Which Vertebrae is this?

Cervical

Which Vertebrae is this?

Thoracic

Which Vertebrae is this?

Lumbar

Sacrum

five fused vertebrae

Thoracic/Rib Cage

Thoracic Vertebrae, Ribs, Sternum

Ribs

24 total (12 right, 12 left)
7 true ribs
5 false ribs
2 floating ribs
rib bones are FLAT

Sternum

Manubrium, Body, Xiphoid Process

How many true ribs and why are they true?

7 and because cartilage attaches directly to the sternum

How many false ribs and why are they false?

5 and because cartilage attached to to other cartilage not sternum

How many floating ribs are there?

2

The Skull

Consists of the cranium and the bones of the face

What does the cranium enclose?

Cranial Cavity

What do facial bones surround and protect?

The entrances to the respiratory and digestive tracts

Superficial landmarks include the sutures

Lambdoid, Coronal, Sagittal, Squamous, Frontonasal

Cranial Bones

Occipital, Parietal, Temporal, Frontal, Sphenoid, Ethmoid