Sutures

Front 1

Midline articulation point of the two parietal bones.

Back 1

Sagittal suture (frontal)

Front 2

Point where the parietals meet the frontal bones.

Back 2

Coronal suture (frontal)

Front 3

Point where the temporal bone articulates with the parietal bone.

Back 3

Squamous suture (Temporal)

Front 4

A bridgelike projection that joins the zygomatic bone (cheekbone) anteriorly. Together these two bones from the zygomatic arch.

Back 4

Zygmatic process (Temporal)

Front 5

Canal leading to ear drum.

Back 5

External acoustic meatus (Temporal)

Front 6

Needle like projection inferior to external auditory meatus that serves as an attachment point for muscles and ligaments of the neck. This process is often broken off demonstration skulls.

Back 6

Styloid process (temporal)

Front 7

Rough projection inferior and posterior to external auditory meatus; an attachment site for muscles.

Back 7

Mastoid process (Temporal)

Front 8

Opening medial to the styloid process that allows the internal jugular vein and cranial nerves.

Back 8

Jugular foramen (Temporal)

Front 9

Opening medial to the styloid process that allows the internal carotid artery to enter the cranial cavity.

Back 9

Carotid canal (Temporal)

Front 10

Opening on the posterior aspects of temporal bone allowing cranial nerves to pass.

Back 10

Internal acoustic meatus (Temporal)

Front 11

Point of articulation of occipital bone and parietal bones.

Back 11

Lambdoid suture (Occipital)

Front 12

Large opening in the base of occipital that allows the spinal cord to join with the brain.

Back 12

Foramen magnum (Occipital)

Front 13

Rounded projections lateral to the foramen magnum that articulate with the first cervical vertebra (atlas)

Back 13

Occipital condyles (Occipital)

Front 14

Portions of the sphenoid seen exteriorly on the lateral aspect of the skull, anterior to the temporal bones. Form parts of the orbit.

Back 14

Greater wings (Sphenoid)

Front 15

Permanent Maxillary Lateral Incisors

Back 15

Eruption: 8-9 years
Crown Completion: 4-5 years
Root Completion: 11 years
First Evidence of Calcification: 1 year

Front 16

Bat-shaped portions of the sphenoid anterior to the sella turcica.

Back 16

Lesser wings (Sphenoid)

Front 17

Opening posterior to the sella turcica that allows a branch of a cranial nerve to pass.

Back 17

Foramen ovale (Sphenoid)

Front 18

Allows the optic nerve to pass.

Back 18

Optic canal (Sphenoid)

Front 19

Transmit cranial nerves to the eye.

Back 19

Superior orbital fissure (Sphenoid)

Front 20

Vertical projection to which the dura matter attaches.

Back 20

Crista galli (Ethmoid)

Front 21

Bony plates lateral to the crista galli through which olfactory fibers pass to the brain from the nasal mucosa.

Back 21

Cribriform plates (Ethmoid)

Front 22

Thin, delicately coiled plates of bone extending medially from the ethmoid into the nasal cavity. The conchae increases the surface area of the mucosa that covers them, thus increasing the mucosa's ability to warm and humidify incoming air.

Back 22

Superior and middle nasal conchae (Ethmoid)