Lesson 2 - Skeletal System

Question 1

Two Types of Skeleton and purpose

Answer 1

Axial Skeleton: Core bones, canal/cage to protect and provide support

Appendicular: limbs, proximal and for movement

Question 2

5 types of bones and location/function

Answer 2

Long bone- longer then wide, appendicular and for movement
Short bone- wider then long, appendicular and for support
Flat bones- thin and curved, axiall bones and for protection
Irregular- complex shape and size, mostly axial and many func
Sesamoid- embedded with tendons for wear and tear

Question 3

Osteological Landmarks

Answer 3

Projection-sticks out
Articulations - connecting two points
Opening- canal

Question 4

Neurocranium (8 bones, cranial cavity)

Answer 4

Frontal
Parietal x2
Temporal x2
Occipital
Sphenoid
Ethmoid

Question 5

Viscerocranium (facial bones, 14)

Answer 5

Mandible
Maxillae x2
Palatine x2
Zygomatic x2
Lacrimal x2
Nasal x2
Vomer x2
Inferior Nasal Conchae x2

LIVN PMMZ

Question 6

Coronal Suture

Answer 6

Immovable joint that holds skull together.

Coronal is straight across skull (horizontal)

Question 7

Sagittal Suture

Answer 7

Sagittial one, vertical splitting down middle

Question 8

Lambdoid Suture

Answer 8

Occipital bone, divides like a peace sign at back

Question 9

Pterion

Answer 9

Where everything connects in middle of skull

Question 10

Neurocranium (cranial cavity)

Answer 10

Anterior, middle and posterior fossa. Internal skull

Question 11

Sphenoid bone

Answer 11

In between anterior and middle fossa, with greater and lesser wings.

Optical Canal
Foramen Rotundum
Foramen Ovale
Foramen Spinosum
Foramen Lacerum
Sella turcica (Turkish saddle)

Question 12

Ethmoid Bone

Answer 12

Crista Galli, small bone is nasal section

Sits above vomer and contains ethomoid cells.

Contains alfactory foramina - sponge like holes

cribriform plate-supports bone

Question 13

Optical canal

Answer 13

Where nerve of eye socket goes through, small hole

Question 14

Superior orbital fissure

Answer 14

curved shaped hole in eye socket

Question 15

Zygomatic arch

Answer 15

Connecting bone to zygomatic like a bridge

Question 16

External and internal acoustic meatus

Answer 16

ear hole

Question 17

Mastoid process

Answer 17

Earlope looking bone

Question 18

Styloid process

Answer 18

Stylis on DS, pointy projection

Question 19

Coronoid process

Question 20

ramus process

Answer 20

on madible, side of jaw

Question 21

condyloid process

Answer 21

lateral to the coronoid

Question 22

external occipital proturbance

Answer 22

bone on occipital, feel back of head

Question 23

Frontal sinus

Answer 23

front of internal skull

Question 24

Juguar foramen

Answer 24

for jugualar vein, when looking at formane magnum internally, it is much smaller but the first hole superior, the second in interal acoustic meatus

Question 25

Foramen magnum

Answer 25

when looking internally, the massive hole

Question 26

Olfactory foramina

Answer 26

sponge like part to ethmoid, lateral to crista galli on both sides

Question 27

Cribriform plate

Question 28

Occipital condyle

Answer 28

seen on inferior view of skull, two tab like structures that connect the cranium and vertebrae

Question 29

Sinuses and cells

Answer 29

Frontal, Sphenoid and Maxillary Sinuses. Ethmoid cells