Anatomy Quiz 3 - Cranial bones and Compact bone

Structure of compact bone

Osteon/Haversion system

Functional unit of compact bone

Osteonic canal/Haversian canal/Central canal

4

Provides blood supply to osteon

Perforating canals/Volkmann’s canals

11

Provides blood supply between osteons

Lamellae concentric

3

Lamellae interstitial

1

Outer lamellae circumferential

2

Inner lamellae circumferential

15

Osteocyte

d

Bone cell

Lacunae

c

House osteocytes

Canaliculi

a

Connect osteocytes together and to osteonic canal

CRANIAL BONES:

Frontal bone

Glabella

Supraorbital foramen/Supraorbital notch

Frontal sinuses

Anterior cranial fossa

Zygomatic process

Parietal bones

Sagittal suture

Coronal suture

Lambdoid suture

Squamous suture

Sutural bones/Wormian bones

Occipital bone

Foramen magnum

Occipital condyle

Nod head

External occipital protuberance

Superior nuchal line

Inferior nuchal line

Posterior cranial fossa

Condylar fossa/Condyloid fossa

Hypoglossal canals

Runs hypoglossal nerve CN XII

Temporal bones

Squamous region

Zygomatic arch

Zygomatic process

Mandibular fossa

Tympanic region

External auditory meatus/canal and Styloid process

External auditory meatus/canal

Styloid process

Mastoid region

All structures have mastoid in name

Mastoid process

Stylomastoid foramen

Facial nerve CN VII

Mastoid foramen

Petrous region

Carotid canal

Main brain artery passes through

Middle cranial fossa

Internal acoustic canal/Auditory canal

Transmits facial nerve CN VII and vestibulocochlear nerve CN VIII

Jugular foramen

Largest vein in head (internal jugular vein), glossopharyngeal nerve CN IX, vagus nerve CN X, and accessory nerve CN XI

Foramen lacerum

Almost completely closed by cartilage in living human

Sphenoid bone

Greater wings

Lesser wings

Sphenoidal sinuses

Sella turcica

Whole thing

Dorsum sellae

Posterior part

Hypophyseal fossa

Middle part

Tuberculum sellae

Anterior part

Jugum sphenoidale

Medial pterygoid process

Inner process

Lateral pterygoid process

Outer process

Anterior clinoid process

Paired

Posterior clinoid process

Paired

Optic canal

Superior orbital fissure

Foramen rotundum

Foramen ovale

Foramen spinosum

Ethmoid bone

Cribriform plate (w/ olfactory foramen)

Olfactory nerve CN I

Perpendicular plate

Superior nasal conchae

Middle nasal conchae

Ethmoidal sinuses/ethmoid air cells

Crista galli