The Skull (Facial and Cranial Bones, Sutures)

Hyoid

small u-shaped bone in neck where many tongue muscles attach, facial

Metopic suture

(if present) unites the two frontal bones

2 possible functions of the sinuses

1. lighten the facial bones 2. act as a resonance chamber for speech

Definition of suture

FIBROUS JOINTS, all but one of the bones of the skull are joined by these interlocking joints

Why is the sphenoid called the keystone of the cranium

It comes in contact with all of the other cranial bones (if it breaks, all cranium caves)

Maxilla

anterior part of the hard palate, facial

Nasal

bridge of nose, facial

Zygomatic

cheekbone, facial

What is the orbit

eye socket

Frontal

forehead bone, cranial

Inferior nasal concha

forms the most inferior turbinate

What bones contribute to the formation of the orbit

frontal, maxilla, lacrimal, ethmoid, sphenoid, palatine, zygomatic ACRONYM: ELF SZ: M & P (sounded out: elf size: medium and petite)

Name the 8 bones of the cranium

frontal, occipital, sphenoid, ethmoid, right and left parietal, right and left temporal ACRONYM: Old People (2) From Texas (2) Eat Spiders

Mandible

lower jaw, site of mental foramen, facial

Contain the sockets bearing teeth

mandible and maxilla

With one exception, the skull bones are joined by sutures. Name the exception

mandible and temporal

Occipital

most posterior part of the cranium, condyles here articulate with the atlas, foramen magnum contained here, cranial

Parietal

much of the lateral and superior cranium, cranial

Palatine

posterior bones of the hard palate, facial

Sphenoid

singular irregular bat-shaped bone forming part of the cranial base, site of sella turcica, cranial

Temporal

site of the mastoid process, site of styloid process, organ of hearing is found here, cranial

Four bones containing paranasal sinuses

sphenoid, ethmoid, frontal, maxilla

Ethmoid

superior and middle nasal conchae form from its projections, site of cribriform plate, bears an upward protrusion also called the "rooster's comb" or crista galli, cranial

Which bones are connected by a squamous suture

temporal and parietal on each side of the skull

Lacrimal

tiny bones bearing the tear ducts, facial

Coronal suture

unites the frontal with the parietal bone

Lambdoid suture

unites the parietal bones with the occipital bone

Squamosal suture

unites the squamous portion of the temporal bone with the parietal bones

Sagittal suture

unites the two parietal bones to the midline

Two bones that form the nasal septum

vomer and ethmoid