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skeletal system
A&P 106
51
Other
Not Applicable
09/29/2007

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Term
foramen
Definition
An opening through a bone, which usually serves as a passageway for blood vessels, nerves, or ligaments.
Term
fossa
Definition
A relatively deep pit or depression.
Term
sinus
Definition
A cavity within a bone
Term
4 functions of bones
Definition
1. framework
2. protects organs
3. contains and protects bone marrow
4. stores calcium
Term
long bones (examples)
Definition
arms, legs, hands, feet
Term
diaphysis
Definition
shaft of a long bone
Term
epiphysis
Definition
long bone ends - inside is spongy bone
Term
medullary cavity contains...
Definition
yellow marrow
(is inside long bones)
Term
short bones
Definition
hands and feet
Term
flat bones
Definition
ribs, patella, scapula, hip, cranial
(spongy bones)
Term
irregular bones
Definition
vertebrae, facial bones (spongy bones)
Term
red vs yellow marrow
Definition
red - spongy bone
- produces blood cells

yellow - inside compact bone
- composed of fat
Term
periosteum
Definition
covers bone
Term
4 types of bone cells
Definition
1. osteogenic
2. osteoblast
3. osteocyte
4. osteoplast
Term
osteogenic cell
Definition
-undifferentiated
- come from fibroblasts
Term
osteoblasts
Definition
-bone forming cells
-mineralize bone within periosteum
Term
osteocyte
Definition
- a trapped osteoblast
-passes nutrients through canniculi
Term
osteoclast
Definition
- dissolves bone, reabsorbs minerals
- cleans up bone fragments
Term
4 factors affecting reabsorbtion and formation of bone
Definition
1. heredity
2. nutrition
3. hormones
4. exercise
Term
long bones form from...
Definition
the center
Term
closed fracture
Definition
no open wound
Term
open compound fracture
Definition
protrudes through skin
Term
greenstick fracture
Definition
splits longitudinally
Term
spiral fracture
Definition
twisting
Term
comminuted fracture
Definition
2 or more intersecting fractures, with fragments
Term
impacted fracture
Definition
broken ends pushed into each other
Term
ligaments
Definition
connect bone to bone
Term
tendons
Definition
connect bone to muscle
Term
cartilage
Definition
shock absorber, reduces friction
Term
bursae
Definition
sac of synovial fluid in joints
Term
calcitonin and parathyroid hormone
Definition
negative feedback system
Term
calcitonin
Definition
incr calcium, incr its absorbtion in small intestine
Term
parathyroid hormone
Definition
decreases blood calcium level
Term
lordosis
Definition
sway back
Term
kyphosis
Definition
hunch back - aging
Term
scoliosis
Definition
curved to side
Term
joint capsule
Definition
encloses joint in strong sheath
Term
articular cartilage
Definition
provides a smooth surface on bone structures
Term
synovial membrane
Definition
lines joint capsule
secretes synovial fluid
Term
how many bones in human skeleton
Definition
206
Term
we are born with how many bones?
Definition
300
Term
longest bone in the body
Definition
femur
Term
what is the shortest bone in the body?
Definition
stapes
Term
______ joints connect bones w/o allowing movement
Definition
fibrous joints connect bones w/o allowing movement
Term
bursa sacs are in...
Definition
synovial joints
Term
_____ joint allows extension and retraction of appendage
Definition
hinge joint allows extension and retraction of appendage
Term
_____ joint allows movement back and forward, up and down, but not rotation
Definition
saddle joint allows movement back and forward, up and down, but not rotation
Term
_____ joint allows rotation around an axis
Definition
pivot joint allows rotation around an axis
Term
_________ joint allows movement in any direction
Definition
ball and socket joint allows movement in any direction
Term
_____ joint allows rotation around bones to slide past each other
Definition
gliding joint allows rotation around bones to slide past each other
Term
______ joint allows for little movement
Definition
cartilage joint allows for little movement
(ie ribs)
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