Chapter 7 Flashcards
Skeletal Part 1
how many bones in the skeletal system
206
how many bones at birth
270
sutural bones/wormian develop in the
lamboidal or conoral sutures
what are the two divisions of the skeletal system
axial and appendicular
what does the axial skeleton consist of
skull, ossicles, hyoid, vertebrae, rib cage
what does the appendicular skeleton consist of
pectoral girdle, upper limbs, pelvic girdle, lower limbs
how many bones in axial skeleton
80
what bone has 5 fused bones
sacrum
how many pairs of ribs
12
what bones consist of the ossicles
malleus, incus, stapes
how many appendicular bones
126
os coxae consist of what
3 fused bones each side
processes where tenon or ligament attach is called
projections
if projections form a joint it has
condyles and facets
depression, grooce, fossa, notch, meatus, fissure, foramen and also sinuses are
depressions/openings
a smooth flattened surface with articular cartilage and forms one side of the joint
facet
a large rounded protuberance covered with articular cartilage forming the other side of the joint
condyle
immovable joints with jagged edges for strength are called
sutures
top of skull, removed to see interior
calvaria
4 sutures
- coronal
- squamosal
- sagitall
- lambdoidal
why do we have jagged sutures
to prevent breaking
forehead, coronal suture, frontal sinus, anterior cranial fossa- support frontal lobe
supraorbital foramen is what cranium bone
frontal
protective brain= sides and roof, sagittal and lambdoid suture, sutural bones. superior and inferior temporal line- mastication
parietal
zygomatic arch, process+ temporal process of zygomatic
manidular fossa
squamous part
inflammation, intense jaw pain when eat and when fully open/ close mouth
TMJ disorder
external acoustic meatus
tympanic part
interal acoustic meatus (nerve for hearing and balance)
mastoid process
styloid process
jugular foramina
carotid canal
petrous part
comprises posterior wall and floor of cranium
occipital
brainstem to spinal cord
foramen magnum
articulation between skull and C1 vertebrae is what
occiptal condyles
site of ligamentum nuchae (attachment keeps head erect)
external occiptal protuberance
midline floor of cranium and nasal septum is what bone
ethmoid bone
what bone is for meningeal attachment
crista galli
whose function is olfactory bulbs, smell, olfactory formina
cribriform plate
what forms upper part of nasal septum
perpendicular plate
what increases surface area of nasal cavity
superior and middle nasal conchae
whats the keystone of cranium and articulates with all other bones
sphenoid
floor of middle cranial fossa
sphenoid
optic nerve eye to brain
optic canal
eye movement of muscles
superior orbital fissure
turkish saddle- pituitary gland
sell turcica
