Bones Of The Skull

Front 1

angle of mandible

Back 1

The point where the body of the mandible meets the ramus.

Front 2

body of mandible

Back 2

The inferior part of the mandible which carries a bony upper rim (alveolar margin) to support the lower teeth.

Front 3

bony palate (palatine process of maxilla)

Back 3

Is made up of the palatine process of the maxilla anteriorly and the horizontal plate of the palatine posteriorly.

Front 4

condylar process of mandible

Back 4

The posterior vertical process of the mandible.

Front 5

coronal suture

Back 5

The suture separating the frontal bone from the mandible.

Front 6

coronoid process of mandible

Back 6

A vertical projection of the mandible which provides attachment for the temporalis muscle.

Front 7

crista galli (ethmoid)

Back 7

A midline crestlike elevation of the ethmoid bone. It divides the cribriform plate into two halves.

Front 8

ethmoid bone

Back 8

A central bone of the nasal cavity. It includes a midline perpendicular plate, two set of paired lateral elevations (superior and inferior conchae), and the ethmoid air cells.

Front 9

external auditory (acoustic) meatus

Back 9

The external ear opening as seen in a skull. It lies within the temporal bone.

Front 10

external occipital protuberance

Back 10

A bony projection of the occipital bone between lambda and the foramen magnum.

Front 11

foramen magnum

Back 11

The large hole on the underside of the skull, through which pass the spinal cord and vertebral arteries.

Front 12

frontal bone

Back 12

The bone underlying the forehead.

Front 13

frontal sinus

Back 13

A paranasal sinus within the frontal bone.

Front 14

greater wing of sphenoid bone

Back 14

A lateral extension of the sphenoid bone which contributes to the wall of the orbit and the temporal fossa, a depression behind the orbit on each side.

Front 15

grove of middle meningeal artery

Back 15

A groove formed by a large artery that supplies the meningela coverings of the brain.

Front 16

head of mandible

Back 16

The upper end of the condyle of the mandible.

Front 17

internal auditory (acoustic) meatus

Back 17

A small opening of the interior of the skull which transmits the vestibuolocochlear nerve from the inner ear, and the facial nerve to supply the muscles of facial expression, submandibular, sublingual, and lacrimal glands.

Front 18

internal occipital protuberance

Back 18

A bony projection of the skull interior. It provides attachment for the fall ciboria and tentorium cerebelli (dural sheets that separate compartments within the skull interior.)

Front 19

lacrimal bone

Back 19

Forms part of the medial wall of the orbit, as well as the upper medial wall of the nasolacrimal canal.

Front 20

lamboid suture

Back 20

The suture between the single occipital and paired parietal bones. It is shaped like the Greek letter lambda.

Front 21

lateral pterygoid plate

Back 21

One of two vertical plates projecting from the sphenoid bone. It provides attachment for the lateral and medial pterygoid muscles.

Front 22

mandible

Back 22

The bone of the lower jaw. It has an alveolar margin to support the teeth, paired condylar processes for articulation with the temporal bone, and paired coronoid processes.

Front 23

mandibular foramen

Back 23

An opening on the medial side of the mandible. It transmits the inferior alveolar nerve and vessels.

Front 24

mandibular notch

Back 24

The notch between the condylar and coronoid processes of the mandible

Front 25

mastoid process

Back 25

A bony projection of the temporal bone witch provides attachment for the sternocleoidomastoid muscle.

Front 26

maxilla

Back 26

The bone of the medial cheek. It contributes to the inferior margin of the orbit and the support of the upper teeth.

Front 27

medial pterygoid plate

Back 27

One of two vertical plates projecting from the sphenoid bone.

Front 28

mental foramen

Back 28

A tiny opening at the from to the mandible which transmits the nerve for sensory supply to the chin.

Front 29

mental protuberance

Back 29

A bony projection of the mandible which provides strength and stability to the mandible.

Front 30

nasal bone

Back 30

A small bone which forms the superior and lateral margin of the piriform aperture of the bony nose.

Front 31

Nasolacrimal canal

Back 31

A bony canal which contains the nasolacrimal duct for the passage of tear fluid to the nasal canal.

Front 32

occipital bone

Back 32

The large bone on the underside of the skull. It provides attachment for the post vertebral muscle so the neck and bears occipital condyles for articulation with the atlas.

Front 33

parietal bone

Back 33

A flat bone of the braincase (calvaria). It articulates with the frontal, temporal, sphenoid, and occipital bones.

Front 34

perpendicular plate of ethmoid bone

Back 34

The vertical midline part of the ethmoid bone.

Front 35

petrous part of temporal bone

Back 35

The hard part of the temporal bone. It houses the inner ear.

Front 36

pituitary fossa

Back 36

The bony depression housing the pituitary gland.

Front 37

ramus of mandible

Back 37

The vertically projecting part of the mandible which gives rise to the condylar and coronoid processes.

Front 38

sigmoid sinus

Back 38

One of the dural venous sinuses of the skull interior.

Front 39

sphenoidal process

Back 39

One of the paranasal sinuses, which connect with the nasal cavity. It is found int he center of the skull within the body of the sphenoid and lies inferior to the pituitary fossa.

Front 40

squamous part of temporal bone

Back 40

The flattened part of the temporal bone. It contributes to the lateral wall of the skull.

Front 41

styloid process

Back 41

An elongated spine projecting inferiorly form the temporal bone. It provides attachment for several muscles.

Front 42

supraorbital notch

Back 42

A small notch on the upper rim of the orbit. In life, it is filled by the supraorbital nerve.

Front 43

temporal line

Back 43

A subtle system of lines on the frontal and parietal bones. They demarcate the margins of the attachment of the temporals muscle.

Front 44

transverse sinus

Back 44

One of the dural venous sinuses of the skull

Front 45

tympanic plate of temporal bone

Back 45

Forms the anterior wall and floor of the external auditory meatus.

Front 46

wisdom tooth

Back 46

The third molar tooth. It is the last permanent tooth to emerge, erupting around the eighteenth birthday.

Front 47

zygomatic bone

Back 47

The bone of the upper lateral cheek. It articulates with the maxilla, temporal, and frontal bones.

Front 48

zygomatic process of temporal bone

Back 48

An anterior projection of the temporal bone.

Front 49

anterior nasal (piriform) aperture

Back 49

The front opening of the bony nasal cavity of the skull. It is pear-shaped, hence the name piriform.

Front 50

anterior nasal spine

Back 50

A bony projection from the inferior margin of the anterior piriform aperture in the midline. It is formed by the maxillae of each side.

Front 51

canine

Back 51

The dagger like tooth between the lateral incisor and the first premolar. Although small in humans, it is large in other primates.

Front 52

glabella

Back 52

The region between the eyebrows in life, or between the superciliary arches in a dried skull.

Front 53

incisors

Back 53

Chisel shaped teeth at the front of the mouth. They cut the food into bite sized pieces. Each of the four quadrants of the mouth has a medial and lateral incisor.

Front 54

inferior nasal concha

Back 54

A bone which forms a scroll like elevation on the lower lateral wall of the nasal cavity. The conchae are covered with mucous membranes, which warm and moisten the air. They also produce turbulence in the airstrip so that dust drops out of inhaled air.

Front 55

inferior orbital fissure

Back 55

A fissure in the posterior floor of the orbit. It is crossed by the maxillary division of the trigeminal nerve.

Front 56

inferior orbital margin

Back 56

The lower rim of the margin of the orbit. It is mainly formed by the maxilla and zygomatic bone.

Front 57

infraorbital foramen

Back 57

A small hole in the maxilla below the orbit. It transmits the infraorbital nerve, which supplies the skin of the cheek below the orbit.

Front 58

lambda

Back 58

The point where the sagittal suture meets the lambdoid suture. It corresponds to the posterior fontanelle of infants.

Front 59

lesser wing of the sphenoid bone

Back 59

The smaller medial extension of the sphenoid. It forms the medial margin of the super orbital fissure and contributes to the anterior rim of the middle cranial fossa.

Front 60

lower teeth

Back 60

The teeth inserted into he mandible. In an adult, each side has two incisors, one canine, two premolars, and three molars.

Front 61

mental tubercle

Back 61

The lateral end of the mental protuberance.

Front 62

middle nasal concha

Back 62

One of the scroll like elevations on the lateral wall of the nasal cavity. It is part of the ethmoid bone.

Front 63

molars

Back 63

Posterior teeth which provide grinding surfaces for reducing food to a paste. Each quadrant of the mouth has three molars, the last of which is the wisdom tooth.

Front 64

nasal septum

Back 64

The midline wall between the paired nasal cavities. It comprises a bony part (ethmoid and vomer bones)superiorly and posteriorly and a septal cartilage anteriorly.

Front 65

orbit

Back 65

The bony cavity containing the eye, lacrimal gland, extra ocular muscles, nerves, vessels, and orbital fat. It is bound by the maxilla, frontal, sphenoid, ethmoid, and lacrimal bones.

Front 66

premolars

Back 66

Crushing teeth situated between the canine and first molar. There are two in each of the four quadrants of the mouth.

Front 67

sagittal suture

Back 67

The suture running down the middle of the skull between the parietal ones of each side.

Front 68

superciliary arch

Back 68

An elevation of the frontal bone that extends laterally from the glabella.

Front 69

superior orbital fissure

Back 69

An opening which allows the oculomotor, trochlear, and abducens nerves, and branches of the ophthalmic division of the trigeminal nerve, to enter the orbit from the middle cranial fossa.

Front 70

upper teeth

Back 70

The teeth inserted into the maxilla. In an adult, each side has two incisors, one canine, two premolars, and three molars.