Skeletal System PART 1

Coronal Suture

separates frontal and parietal bones

Lambdoid Suture

separates parietal and occipital bones

Squamous Suture

separates temportal bones from parietal and frontal bones

Ethmoid Bone

unpaired, contributes to walls of orbital and nasal cavities, medial and anterior portion of cranial base, holds nasal conchae

Frontal Bone

anterior part of cranium, supraorbital region, joins with zygomatic bone at zygomatic process

Parietal Bones

paired, form middle and lateral portion of cranium

Occipital Bone

unpaired, forms posterior portion of cranium

Temporal Bones

paired, most lateral portion of cranium, contains hearing and balance mechanisms

Sphenoid Bone

unpaired, forms platform across front base of skull, anterior to foramen magnum, greater wings serce as important muscle attachment

Mandible

unpaired, makes up jaw

Maxilla

paired, makes up front of face including roof of mouth

Nasal Bones

paired, form bridge of nose

Palatine Bones

paired, hidden, help form nasal cavity and hard palate (back 1/4)

Lacrimal Bones

paired, form portion of lateral nasal wall and medial orbit

Zygomatic Bones

paired, form cheekbones and lateral orbits, articulate with temporal/frontal bones + maxilla to form zygomatic arch

Inferior Nasal Conchae

its own bone, articulates with the palatine bone, bottom-most part of lateral nasal wall, help warm and humidify air

Vomer Bone

unpaired, forms inferior and posterior nasal septum, divides nasal cavities

Incisive Foramen

Palatine Process of Maxilla

forms floor of nasal cavity and bony roof of mouth

Molars

Back of mouth, large, flat surface, good for grinding and chewing

Premolars

between canines and molars, good for tearing and grinding, broad, ridged surfaces

Canines

next to incisors, pointed, good for tearing and gripping

Incisors

anterior position, flat/chisel-shaped with sharp edges, used for cutting and biting

Prognathia

protruded mandible

Micrognathia

small or retracted mandible (overbite)

Torsiversion

rotated individual teeth

Labioverted

teeth tilted towards lips

Linguaverted

teeth tilted towards tongue

Distoversion

teeth tilted towards the back

Mesioversion

teeth tilted towards the front

Sphenoid Bone

unpaired, forms platform across front base of skull, anterior to foramen magnum, greater wings serce as important muscle attachment

Palatine Bones

paired, hidden, help form nasal cavity and hard palate (back 1/4)

Foramen Magnum

Hole through which spinal cord goes through to reach brainstem, where vertebrae connect with skull

Occipital Condyles

on either side of foramen magnum, where the atlas articulates with the skull

External Occipital Protuberance

Small bump at the back of the head

Mastoid process of temporal bones

Zygomatic process of temporal bones

Styloid process of temporal bones

External auditory meatus

Greater wings of sphenoid bone

feature lateral and medial pterygoid plates, laterally and upward-directed, extend to outer surface of skull

Body of mandible

Ramus of mandible

Angle of mandible

Coronoid Process of mandible

Condyle/condyloid process of mandible

Zygomatic process of maxilla

Frontal process of maxilla

alveolar process of maxilla

houses upper teeth

Palatine process of maxilla

part of hard palate, forms anterior ¾ of roof of mouth and bony floor of nasal cavity

Median/midline intermaxillary suture

Premaxilla/maxillary-premaxillary suture

Third Molar

Second Molar

First Molar

Second Bicuspid

First Bicuspid

Cuspid

Lateral Incisor

Central Incisor