Lecture 6.4: Skeletal System
AKA: The Cranium Protects our brain Gives us our senses
The Skull
Forehead Orbits—spaces for eyes Frontal sinuses—air-filled chambers Lighten bone Produce mucus for nasal cavity
Frontal Bone
Figure 6.10
Posterior to frontal bone Sagittal suture—locks 2 bones together Coronal suture--locks parietal to frontal
Parietal Bone (Paired)
Figure 6.15b
Most posterior Lambdoid Suture—locks occipital with
parietal Foramen magnum—where spinal cord
passes
Occipital Bone
Figure 6.10
Below parietal Squamous suture—connects parietal to
temporal
Temporal Bone (Paired)
Figure 6.10
Part of floor of cranium Unites cranium and facial bones Sella turcica—depression that houses
pituitary gland
Sphenoid Bone
Figure 6.12a
Anterior to sphenoid Medial eyes and roof and sides of nasal
cavity Nasal septum—divides nose into left/right
sides
Ethmoid Bone
Figure 6.12a