Axial Skeleton Skull

33 terms by Catheran 

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forehead bone

frontal

cheekbone

zygomatic

lower jaw

mandible

bridge of nose

nasals

posterior part of hard palate

palatines

much of the lateral and superior cranium

parietals

most posterior part of cranium

occipital

single, irregular, bat-shaped bone, forming part of the cranial floor

sphenoid

tiny bones, bearing tear ducts

lacrimals

anterior part of hard palate

maxillae

superior and middle nasal conchae formed from its projections

ethmoid

site of mastoid process

temporals

site of sella turcia

temporals

site of cribriform plate

ethmoid

site of mental foramen

mandible

site of styloid process

temporals

four bones, containing paranasal sinuses

ethmoid, frontal, maxiallae, sphenoid

its condyles articulate with the atlas

occipital

foramen magnum contained here

occipital

middle ear found here

temporals

nasal septum

vomer

bears an upward protrusion, the "cock's comb," or crista galli

ethmoid

site of external acoustic meatus

temporals

When a bone forms from a fibrous membrane, the process is called______ossification.

membranous

when trapped in lacunae, osteoblasts change into_______.

osteocytes

Large numbers of______ are found in the inner periosteum layer.

Osteoblasts

_______ossification centers appear in the epiphyses of a long bone.

secondary

Epiphyseal plates are made of ________.

hyaline-cartilage

In appositional growth, bone reabsorption occurs on the ____surface.

endosteal

"Maturation" of newly formed (noncalcified) bone matrix takes about_____.

10 days.

What are sinuse?

Mucosa-lined, air-filled cavities in bone

What purpose do sinuse serve in the skull?

They lighten the skull and serve as resonance chambers for speech.

Why are sinuses so susceptible to infection?

Their mucosa is continuous with that of the nasal passages into which they drain.

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