Cranium

How many cranium bones are there?

8 cranium bones

How many facial bones are there?

14 facial bones

How many hyoid bones?

1

How many auditory ossicles?

6

How many bones of the vertebral column

26

How many ribs are there?

24 ribs

How many total bones of the axial skeleton?

80 bones

Parietal bone

Separated from each other by the sagittal suture, the frontal bone by the coronal suture

temporal bone

squamous part of temporal bone

petrous part of temporal bone

mastoid process

Rounded projection attachment site for many neck muscles

external (acoustic) auditory meatus

directs sound into ear

occipital bone (skull)

foramen magnum

Medulla oblongata of brain connects with spinal cord through this hole

frontal bone

sphenoid bone

Middle part of the base of the skull. Greater and lesser wings articulate and hold together other cranial bones, such as frontal, occipital, parietal and ethmoid.

ethmoid bone

Supporting structure of the nasal cavity positioned in the anterior part of the cranial floor between the orbits

Crista Gali

the point - an attachment ridge for membranes of the brain

supraorbital margin

frontal squama

supraorbital foramen

infraorbital foramen

mental foramen

Saggital Suture (Skull)

Coronal suture

lambdoid suture

Squamous suture

Parietal foramina

tiny hole-like depressions for nerves and blood vessels

zygomatic arch

Zygomatic process articulates with the temporal process of the zygomatic bone

styloid process

pointed projection for attachment of ligaments and muscles of tongue and neck

Mastoiditis

Mastoid air spaces infection

External occipital protuberance

Ligamentum nuchae attaches here and helps support the head

Occipital condyle

Oval processes next to foramen magnum, and articulate with atlas vertebra of neck

Foramen magnum

medulla oblongata of brain connects with spinal cord through this large hole

superior and inferior nuchal lines

sites for muscle attachment

Sella Turcica

Protects the pituitary gland.

What makes up the ethmoid bone?

cribriform plate, crista galli

cribriform plate

forms the roof of the nasal cavity and contains olfactory foramina, where olfactory nerves pass for sense of smell

Perpendicular plate of ethmoid

Foramen magnum

Jugular Foramen

Foramen Spinosum

Foramen Ovale

Foramen Lacerum

Foramen Rotundum

What separates the parietal bone from the occipital bone

Lambdoid suture

What suture separates the frontal bone from the parietal bone?

Coronal suture

What suture separates the two parietal ones?

Sagittal suture

What nerve and artery pass through this foramen?

supraorbital nerve and artery

Frontal Squama

Forms the forehead

Frontal Sinuses

Hollow spaces where air is moistened by mucus membranes

What condyle articulates with the atlas vertebra of neck

occipital condyle

What is the keystone of the cranial floor?

Sphenoid

Why is the sphenoid a keystone of the cranial floor?

Greater and lesser wings articulate with the frontal, occipital parietal and ethmoid

What bone is butterfly-shaped

Sphenoid

What protects the pituitary gland?

Sella turcica

Cribriform plate forms the

roof of the nasal cavity

What does the cribriform plate contain?

olfactory foramina where olfactory nerves pass for sense of smell

Cribriform plate

Crista galli

attachment ridge for brain membranes

What bone forms the anterior part of the cranial floor, medial wall of orbits and superior part of nasal septum?

Ethmoid

____ warm and moistens inhaled air before it flows into lungs and swirls inhaled air so that particles are trapped by moist mucus membranes

Nasal concha

What nasal concha helps with the sense of smell?

Superior nasal concha

What divides the nasal cavity into right and left sides?

Perpendicular plate

superior nasal concha