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Intro to the Skeleton
Bone terminology (type, markings, terminology)
48
Anatomy
Undergraduate 1
01/27/2012

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Term
dense bone
Definition
bone that all space filled in,
hardest form but brittle
Term
spongy bone
Definition
bone that reduces weight and is more springy,
gives more resilience to breaking
Term
long bone
Definition
bone that is longer than wide, roughly cylindrical with a hallow central cavity
Term
short bone
Definition
bone that is approximately that same length as width, tend to be blocky
Term
flat bone
Definition
flat outer layers of dense bone surrounding a layer of spongy bone
Term
irregular bone
Definition
bones that don't have well-defined shapes
Term
pneumatized bone
Definition
bones that contain air spaces
Term
sesamoid bone
Definition
bones that form in tendons as reinforcement
Term
example of long bone
Definition
humerus, metacarpals
Term
example of short bone
Definition
carpals and tarsals
Term
example of flat bone
Definition
roof bones of skull, shoulder blade, ribs
Term
example of irregular bone
Definition
vertebrae
Term
example of pneumatized bone
Definition
bones of the face and lower skull
Term
example of sesamoid bone
Definition
patella
Term
process
Definition
bone marking that is any projection or bump on a bone
Term
crest
Definition
bone marking that is a prominent ridge
Term
line
Definition
bone marking that is a low ridge
Term
foramen (foramina)
Definition
bone marking that is a hole
Term
tubercle
Definition
bone marking that is any small rounded projection or bump (usually smooth process)
Term
tuberosity
Definition
bone marking that is a large, rough, bulging, irregular projection or bump
Term
fossa
Definition
bone marking that is a dent or depression
Term
head
Definition
bone marking that is a large, smooth, round knob on end of bone
Term
diaphysis
Definition
long cylindrical region in center of a bone
Term
epiphysis
Definition
knobs on each end of a bone
Term
epiphyseal plate
Definition
region between the diaphysis and epiphysis
Term
articular cartilage
Definition
cartilage on the end of a bone that is part of a joint
Term
periosteum
Definition
layer of dense connective tissue that covers nearly all the way around a bone
Term
medullary cavity
Definition
hallow space in the middle of a bone filled with marrow
Term
endochondral bone development
Definition
most common type of bone development, starts with cartilage and then becomes bone tissue growing out from the middle
Term
cartilage model
Definition
first stage of endochondral bone development,
when embryo first developing cartilage structures formed that look like miniature bones
Term
primary ossification
Definition
second stage of endochondral bone development,
bone cells form and start to build bone tissue in center of diaphysis (medullary cavity formed)
Term
secondary ossification
Definition
third stage of endochondral bone development,
bone cells move into epiphyses and form bone tissue, bone tissue starts in center of epiphysis and grows out toward edges of bone
Term
growth
Definition
fourth stage of endochondral bone development,
bones grow in length at epiphyseal plate (cartilage grows and then bone growth follows)
Term
maturation
Definition
fifth stage of endochondral bone development,
bones finish growing at different times in life
Term
membranous bone development
Definition
1. thick connective tissue membrane
2. spongy bone starts to form in middle of thickness (layer of connective tissue on each side)
3. compact bone forms above and below spongy bone
Term
synovial joints (diarthrosis)
Definition
freely moveable joints
(lined with synovial membrane that secretes synovial fluid that lubricates joint)
Term
fibrous articulations
Definition
joints that are not freely moveable
Term
ball and socket
Definition
type of articulation that allows the most freedom; allows bending in two directions and rotation
Term
ellipsoid (condyloid)
Definition
type of articulation that is an oval knob in an elongate socket; allows bending in two directions
Term
hinge
Definition
type of articulation that allows bending in one direction
Term
gliding
Definition
type of articulation where two approximately flat surfaces are in contact (allows sliding in two directions, but small amount of movement)
Term
slightly moveable joints
Definition
type of fibrous articulation that is the joint between the hip bones and between inter-vertebral discs
Term
immovable joints
Definition
type of fibrous articulation that is in sutures between skull bones
Term
flexion
Definition
type of movement of an articulation;
when angle between body parts is reduced
Term
extension
Definition
type of movement of an articulation;
when angle between body parts is increased
Term
adduction
Definition
type of movement of an articulation;
body parts are moved toward the midline
Term
abduction
Definition
type of movement of an articulation;
body parts are moved away from the midline
Term
rotation
Definition
type of movement of an articulation;
when bone turns around its long axis
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