Skeletal System Flashcards
Functions of the skeletal system
support- provide structural framework
provide attachment for tendons and muscles
protection- protect vital organs
Assistance in movement- skeletal muscles attch to tendons and contract pulling on bone
mineral homeostasis- store minerals e.g calcium
blood cell production- in red bone marrow
tryglyceride storage- yellow bone marrow
structure of bone tissue
water
collagen fibre- flexibility
blood vessels
mineralised salts- hardness
extracellular matrix
osteocyte
mature bone cell
signalling communicate
osteoblast
synthesie matrix cell responsible for bone growth
osteoclast
breakdown bone- build strength for bone reabsorobing cell
bone tissue- organic
flexibility
bone tissue- inorganic
rigid
torsional stress- bending
increase bone tissue tightly packed- oteons
compact bone
compressive force
increase criscross pattern of trabecular
spongy allows force
divisions of skeleton
axial, appendicular
axial
longitude axis
exclude scapula, pelvis, clavicle (griddle)
appendicular
limbs
griddle- pelvis, scapula, clavicle
Bone Types
Long
short
seasamoid
irregular
flat bone
long bone
femur, fallanges
length longer then width
short bone
calcenius, carpals
length and width is the same
Flat bone
sternum, illeum
flat for mucle attachment
irregular bone
verterbrae, zygomatic bone
seasamoid
patella
sorounded by tendons
3 types of bone surface markings
Depressions, projections, areas for articulation
Roughened Bumps
trochanter
tuberosity
tubercle
projection
Bridge of bone
Ramus
bridge 2 bones together
projection
Raised crest
line- splits into two ridges
ridge
spine
crest- raised ridge
Roughnened area above condyle
epicondyle
areas for articulation
head- proj
condyle- proj
facet depression
