SKELETAL SYSTEM Flashcards
the human skeleton is initially made up of what?
cartilages and fibrous membranes
the most abundant cartilage
hyaline cartilage
at what age do the skeleton completely harndened
25 yrs old
how many bones does an adult human skeleton has
206
what are the functions of the bone
support
protection
allows movement
storage
blood cell formation
these are bones that are longer than they are wider (bone classification)
long bones
these are bones that are cube shape in structure and also include sesamoid bones (bone classification)
short bones
these bones are thin, flattened and usually curved bones (bone classification)
flat bones
these bones does not fit in the 3 categories (bone classification)
irregular bones
this is the end of the long bone
epiphysis
part of epiphysis that is near to the point of attachment
proximal
part of epiphysis that is not in contact with point of attachment
distal
this is the shaft of the long bone, this makes up most of the long bone’s length
diaphysis
this is the angulation between epiphysis and diaphysis
metaphysis
a type of bone tissue that is smooth and homogenous. this forms the hard, dense layer of bones.
compact bone (cortical bone)
a type of bone tissue that is spiky and homogenous in appearance. it is lighter and less dense than the compact bone
spongy bone (cancellous bone)
a type of bone tissue that is spiky and homogenous in appearance. it is lighter and less dense than the compact bone
spongy bone (cancellous bone)
this is the external coverage, somewhat hyaline cartilage that produces smooth surface and decrease friction when lubricating fluid is present
articular cartilage
this is the connective tissue that is outside covering of the diaphysis
periosteum
this is the connective tissue that lines the inner surface of the bony tissue
endosteum
this is the storage area of red bone marrow in children
medullary cavity
red bone marrow produces RBC up to what age?
6-7 yrs old
when the child reaches the age of 8, the RBC will be replaces by what adipose tissue?
yellow marrow
bone markings that are sites of muscle and ligament attachment
projections
a large, rounded projection that may be roughened
tuberosity
a narrow ridge of the bone which are usually prominent
crest
a projection that is a very large blunt, irregularly shaped
trochanter
projection that is a narrow ridge and are less prominent
line
a small rounded projection
tubercle
projection that is a raise area on/or above condyle
epicondyle
this are any bone prominence
process
what are the projections that helps to form joints
head
condyle
facet
ramus
a bony expansion that have a neck area
head
a rounded articular projection
condyle
a smooth, nearly flattened, articular surface
facet
arm like bar of bone
ramus
bone markings for passage of blood vessels and nerves
depressions and openings
A furrow in the bone surface
groove
a narrow slit opening in the bone
fissure
a round or oval opening through a bone
foramen
indentation at the end of the bone
notch
these are canal-like passage
meatus
these are cavities within a bone
sinus
shallow basin like depression
fossa
the prenatal stage is made up of ______ that will turn into bone.
hyaline cartilage
bone development from fibrous membrane
intramembranous ossification
bone development from hyaline cartilage
endochondral ossification
all bones are endochondral except for what bones?
flat bones of the skull, mandible and clavicle
this zone is the end of epiphysis, anchors the epiphysial plates to epiphysis
zone of resting cartilage
this zone has many rows of cell undergoing mitosis
zone of proliferating cartilage
this zone has cells that are left behind
zone of hypertrophic cartilage
this zone has thin dead cells and calcified cellular matrix
zone of calcified cartilage
bone retardation is caused by what factor?
vitamin A deficiency
fragile bone is caused by what factor?
vitamin C deficiency
means “weakening of bones”, and is caused by vit D, calcium, and phosphate deficiency (with stunted growth)
rickets
osteomalacia is caused by what factor? (softening of bones)
vitamin D deficiency
a medical condition of having insufficient bone growth/ growth hormones
dwarfism
a medical condition of having excessive growth hormones (IGF1), happens during childhood when growth plates are still open
gigantism
a medical condition of having excessive growth hormones, happens during adulthood when growth plates are already fused
acromegaly
this is an indication that there is insufficient thyroid hormone
delayed bone growth
a hormone that promotes the bone formation and stimulates ossification of the epiphysial plate
sex hormones
this can also stimulate bone growth
physical stress
the axial skeleton is composed of what bones?
skull
hyoid bone
thoracic cage
the appendicular skeleton is made up of what bones
pectoral girdle
upper limbs
pelvic girdle
lower limbs
3 parts of the skull
1) neurocranium
2) sutures
3) membranous viscerocranium
a part of the skull that forms the protective cranial cavity that surrounds the brain
neurocranium
a part of the skull where two bones meet
sutures