Bone Models

Osteocyte

Function: maintain bone matrix

A

Lacuna

Function: small chambers holding osteocytes

B

Osteon

Function: functional unit of the bone

C

Canaliculi

Function: connects osteon cells to nutrient supply

D

Concentric Lamellae

Function: makes up osteon layers

E

Interstitial Lamella

Function: fills spaces betw osteons concentric lamallae

F

Central Canal

1

Concentric Lamellae

Function: makes up osteon layers

2

Canaliculi

Function: connects osteon cells to a nutrient supply

3

Osteocyte

Function: maintain bone matrix

4

Osteon

Function: functional unit of the bone

5

Circumferential Lamella

Function: structural support on outer portion of long bone

A

Endosteum

Function: bone breakdown site

B

Sharpey's Fibers

Function: allows blood vessels & nerves to invade the bone

C

Spongy Bone

Function: shock absorption

D

Periosteal Blood Vessel

Function: brings blood to bone interior & osteocytes

E

Periosteum

Function: protects bone

F

Volksmann's Canal

Function: communication pathway betw. bone interior & exterior surface

G

Superior Orbital Fissure

Function: passageway for CN #'s 3-6

1

Hypophyseal Fossa

Function: holds the pituitary gland

2

Posterior Clinoid Process

3

Dorsum Sellae

4

Pterygoid Processes

5

Optic Canal

Function: passage for optic nerves/CN #2

6

Greater Wing

Function: forms part of the lateral eye orbit

7

Lesser Wing

8

Body

9

Foramen Rotundum

Function: allows passage of a branch of the 5th CN

10

Foramen Ovale

Function: allows passage of a branch of the 5th CN

11

Foramen Spinosum

Function: passage arteries and nerves

12

Orbital Surface (of lateral mass)

A

Crista Galli

Function: attachment point of the dura mater

B

Superior Nasal Concha

C

Middle Nasal Concha

Function: helps turbinate air coming into nasal cavity

D

Perpendicular Plate

Function: superior part of nasal septum

E

Ethmoid Sinus

Function: resonance chamber for speech

1

Olfactory Foramina

Function: allows passage of the olfactory nerve/CN #1

2

Cribriform Plate

Function: holds olfactory foramina

3

Lateral Masses

Function: forms medial orbital plates of ethmoid

4

Crista Galli

Function: attachment point of the dura mater

5

Shaft

1

Rib Angle

2

Head

3

Neck

4

Tubercle

5

Costal Cartilage

6

Acromial End

1

Conoid Tubercle

2

Sternal End

3

Acromion

Function: articulates with the acromial end of clavicle

A

Corocoid Process

B

Glenoid Cavity

C

Subscapular Fossa

D

Lateral Border

E

Inferior Angle

F

Medial Border

G

Superior Angle

H

Suprascapular Notch

Function: allows nerve passage

I

Spine

1

Suprascapular Notch

Function: allows passage of nerves

2

Acromion

Function: articulates with the acromial end of clavicle

3

Glenoid Cavity

4

Lateral Border

5

Inferior Angle

6

Medial Border

7

Infraspinous Fossa

8

Right Humerus

A

Greater Tubercle

B

Lesser Tubercle

C

Head

D

Coronoid Fossa

Function: articulates w/ coronoid process of ulna

E

Trochlea

Function: articulates w/ trochlear notch

F

Capitulum

Function: articulates humerus & radius

G

Intertubercular Sulcus

H

Radial Fossa

I

Medial Supracondylar Ridge

A

Medial Epicondyle

B

Olecranon Fossa

Function: articulates w/ olecranon process of ulna

C

Trochlea

Function: articulates w/ trochlear notch

D

Lateral Epicondyle

E

Lateral Supracondylar Ridge

F

Olecranon Process

Function: articulates w/ olecranon fossa of humerus

1

Left Ulna

Function: articulates w/ radius & humerus proximally, medial carpals distally

2

Left Radius

Function: articulates w/ humerus + ulna proximally, carpals distally

3

Styloid Process of Radius

Function: attachment point for wrist ligaments

4

Styloid Process of Ulna

Function: distal radioulnar joint

5

Trochlea Notch

A

Coronoid Process

Function: articulates w/ coronoid fossa of humerus

B

Olecranon Process

Function: articulates w/ olecranon fossa of humerus

C

Head of Radius

D

Neck of Radius

E

Radial Tuberosity

F

Greater Trochanter

1

Head

2

Neck

3

Medial Epicondyle

4

Lateral Epicondyle

5

Greater Trochanter

A

Head

B

Fovea Capitis

Function: attachment of small ligaments

C