Lesson 2 - Skeletal System Flashcards
Two Types of Skeleton and purpose
Axial Skeleton: Core bones, canal/cage to protect and provide support
Appendicular: limbs, proximal and for movement
5 types of bones and location/function
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
Osteological Landmarks
Projection-sticks out
Articulations - connecting two points
Opening- canal
Neurocranium (8 bones, cranial cavity)
Frontal
Parietal x2
Temporal x2
Occipital
Sphenoid
Ethmoid
Viscerocranium (facial bones, 14)
Mandible
Maxillae x2
Palatine x2
Zygomatic x2
Lacrimal x2
Nasal x2
Vomer x2
Inferior Nasal Conchae x2
LIVN PMMZ
Coronal Suture
Immovable joint that holds skull together.
Coronal is straight across skull (horizontal)
Sagittal Suture
Sagittial one, vertical splitting down middle
Lambdoid Suture
Occipital bone, divides like a peace sign at back
Pterion
Where everything connects in middle of skull
Neurocranium (cranial cavity)
Anterior, middle and posterior fossa. Internal skull
Sphenoid bone
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)
Ethmoid Bone
Crista Galli, small bone is nasal section
Sits above vomer and contains ethomoid cells.
Contains alfactory foramina - sponge like holes
cribriform plate-supports bone
Optical canal
Where nerve of eye socket goes through, small hole
Superior orbital fissure
curved shaped hole in eye socket
Zygomatic arch
Connecting bone to zygomatic like a bridge
External and internal acoustic meatus
ear hole
Mastoid process
Earlope looking bone
Styloid process
Stylis on DS, pointy projection
Coronoid process
ramus process
on madible, side of jaw
condyloid process
lateral to the coronoid
external occipital proturbance
bone on occipital, feel back of head
Frontal sinus
front of internal skull
Juguar foramen
for jugualar vein, when looking at formane magnum internally, it is much smaller but the first hole superior, the second in interal acoustic meatus
