Intro to Skel Flashcards
adult bones
206
adult teeth
32
func of bones
- form skel
- movement
- protection
- mineral storage
- bone marrow
bone fibre shape
matrix
bone struct
90% collagen (org)
10% hydroxyapatite (calcium phosphate)
light but heavy duty
func of hydroxyapatite
rigidity and struct
func of collagen
flexibility
gross anatomy
seeable w naked eye
periosteum
tough vascular membrane covering outside of living bone
endosteum
cellular membrane lining inside of living bone
medullary cavity
hollow space in long bones where yellow marrow is
compact/cortical bone
smooth and dense
external and lining medullary cavity
subchondral bone
under cartilage/joint
spongy/trabecullar/cancellous bone
- ident to cortical bone molecularly
- more porous
- inside bones
- provide lightweight support
osteoporosis
thinning of trabeculae that form spongy bone
diaphysis
primary centre of ossification
epiphysises
secondary centres of ossification
- made of subchondral bone
metaphysises
areas that widen to accommodate growing epiphysises
where is red marrow located?
in spongy bone
epiphyseal line
there epiphysis and metaphysis join
parietals
upper/side skull
temporals
side, just above ear
zygomatics
cheekbone
nasal conchae
inside skull in nose
palatines
back of upper palate
lacrimals
inside of eye socket, middle back
maxillae
upper jaw/upper palate
3 ear bones from external to internal
malleus
incuse
stapes
occipital
back/bottom
frontal
forehead
sphenoid
butterfly behind eyes at temple
vomer
separates nasal cavity
ramus
vertical part of jaw, connects w skull at mandibular condyle
body (jaw)
horizontal part
mental foramen
for blood vessels and jaw
coronal suture
top of head, left to right
saggital suture
front to back, coronal to lambdoidal
lambdoidal suture
triangle at back of head
occipital condyle
connector to 1st cervical vertebra
petrous bone
pyramid, bony outside of ear canal
mandible
lower jaw
cranium
skull w/o mandible
calveria
cranium w/o face
calotte
calveria wo the base (just cap)
splanchnocranium
face only
number of skull parts at birth
45
fontanelle
membrane btwn sep plates of baby skulls
metopic suture
frontal, disappears into adulthood (50s)
meningeal grooves
for soft tissues
hyoid
u shaped
above esophagus
for tongue and thyroid
breaks w strangulation
wormian bones
atypical, in sutures, intramembranous ossification
axial skel
spinal column, sternum, manubrium, ribs, ossa coxae
number of spinal vertebrae
33
regions and number of spinal vertebrae
7 cervical
12 thoraic
5 lumbar
sacrum
coccyx
atlas
C1 that arts w skull
C2 traits
has dips on both sides to art w atlas
spinal discs
cartilage btwn the art facets of vertebrae
spinus process
posterior spikes to protect spinal cord
defining feature of C vertebrae
transverse foramen
defining feature of T vertebrae
costal (rib) facets
looks like a giraffe
defining feature of L vertebrae
square/rectangular spinus process
which vertebrae do the sternum and manubrium art w
T1-T7
why ribs 8-10 “false ribs”
not art w sternum, arts w cartilage that arts w sternum
use which rib to indent
4