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Ch 6 - WWCC Medical Terminology
Skeletal System
146
Medical
Professional
10/15/2011

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Term
articular cartilage
Definition
Thin layer of cartilage that covers the ends of the long bones and the surfaces of the joints.
Term
bone depressions
Definition
Concave, indented areas or openings in bones.
Term
bone head
Definition
A rounded, knoblike end of a long bone, separated from the shaft of the bone by a narrow portion.
Term
bone markings
Definition
Specific features of individual bones.
Term
bone processes
Definition
Projections or outgrowths of bones.
Term
calcaneus
Definition
The larges of the tarsals, also known as the heel bone.
Term
cancellous bone
Definition
Spongy bone, not as dense as compact bone.
Term
carpals
Definition
The bones of the wrist.
Term
cervical vertebrae
Definition
Vertebrae or bones of the neck, C1 through C7
Term
coccyx
Definition
The fifth segment of the vertebral column, located at the very end of the vertebral column, "tailbone"
Term
compact bone
Definition
Hard outer shell of the bone.
Term
condyle
Definition
Knucklelike projection at the end of a bone.
Term
crest
Definition
Distinct border or ridge, as in iliac crest.
Term
diaphysis
Definition
Main shaftlike portion of a bone.
Term
epiphyseal line
Definition
A layer of cartilage that separates the diaphysis from the epiphysis of a bone; also known as the ephiphyseal plate.
Term
epiphysis
Definition
The end of a bone.
Term
ethmoid bone
Definition
Lies just behind the nasal bone, in front of the sphenoid bone.
Term
false ribs
Definition
Rib pairs 8 through 10, which connected to the vertebrae in the back but not to the sternum in the front because they join the seventh rib in the front.
Term
femur
Definition
The thigh bone. Longest, heaviest, and strongest bone in the body.
Term
fibula
Definition
The more slender of the two lower leg bones.
Term
fissure
Definition
A groove or depression in a bone.
Term
flat bones
Definition
Bones that are broad and thin with flat or curved surfaces, such as the sternum.
Term
floating ribs
Definition
Rib pairs 11 and 12, which connect to the vertebrae in the back but are free of any attachment in the front.
Term
fontanelle or fontanel
Definition
Space between the bones of an infant's cranium; "soft spot".
Term
foramen
Definition
Hole in a bone through which blood vessels or nerves pass.
Term
fossa
Definition
Hollow or concave depression in a bone.
Term
frontal bone
Definition
Forms the forehead and the upper part of the bony cavities that contain the eyeballs.
Term
haversian canals
Definition
System of small canals within compact bone that contain blood vessels, lymphatic vessels, and nerves.
Term
hematopoiesis
Definition
The normal formation and development of blood cells in the bone marrow.
Term
humerus
Definition
Upper arm bone.
Term
hyoid bone
Definition
Located just above the larynx and below the mandible. Serves as a point of attachment for muscles of the tongue and throat.
Term
intercostal spaces
Definition
Spaces between the ribs.
Term
intervertebral disk
Definition
A flat, circular platelike structure of cartilage that serves as a cushion between the vertebrae.
Term
lacrimal bones
Definition
Two small bones that are paper thin and shaped somewhat like a fingernail, located at the inner corner of each eye forming the sidewall of the nasal cavity and the middle wall of the eye orbit.
Term
long bones
Definition
Bones that are longer than they are wide and with distinctive shaped ends, such as the femur.
Term
lumbar vertebrae
Definition
The vertebrae of the lower back, L1 through L5.
Term
mandibular bone
Definition
aka mandible. Lower jaw bone. The largest, strongest bone of the face, and the only moveable bone of the skull.
Term
maxillary bones
Definition
Bones of the upper jaw. These two bones form not only the upper jaw but the hard palate.
Term
medullary cavity
Definition
The center portion of the shaft of a long bone containing yellow marrow.
Term
metacarpals
Definition
The bones of the hand.
Term
metatarsals
Definition
The bones of the foot.
Term
nasal bones
Definition
Two slender bones that give shape to the nose by forming the upper part of the bridge.
Term
nasal conchae
Definition
Two inferior bones that help to complete the nasal cavity by forming the side and lower wall.
Term
neck
Definition
A constricted or narrow section that connects with the head, as in the neck connecting to the head or the neck of the femur.
Term
occipital bones
Definition
Form the back of the head and the base of the skull.
Term
orthopedics
Definition
The specialty that deals with the prevention and correction of disorders of the musculoskeletal system.
Term
ossification
Definition
The conversion of cartilage and fibrous connective tissue to bone; the formation of bone.
Term
osteoblasts
Definition
Immature bone cells that actively produce bony tissue.
Term
osteoclasts
Definition
Large cells that absorb or digest old bone tissue.
Term
osteocytes
Definition
Mature bone cells.
Term
palatine bones
Definition
Two bones shaped like the letter L, they have a vertical and a horizontal portion.
Term
parietal bones
Definition
Form the top and the upper sides of the cranium, behind the frontal bones.
Term
patella
Definition
The knee bone, or kneecap.
Term
periosteum
Definition
The thick, white, fibrous membrane that covers the surface of a long bone.
Term
phalanges
Definition
The bones of the fingers, or the toes.
Term
radius
Definition
One of the two lower arm bones. It is on the lateral, or thumb, side of the arm.
Term
red bone marrow
Definition
The soft, semifluid substance located in the small spaces of cancellous bone that is the source of blood cell production.
Term
resorption
Definition
The process of removing or digesting old bone tissue.
Term
sacrum
Definition
The fourth segment of the vertebral column located below the lumbar vertebrae. Single triangular shaped bone that resulted from the fusion of the five individual sacral bones of the child.
Term
sesamoid bones
Definition
Irregular bones imbedded in tendons near a joint, as in the kneecap.
Term
short bones
Definition
Bones that are about as long as they are wide and somewhat boxshaped, such as the wrist bone.
Term
sinus
Definition
An opening or hollow space in a bone, a cavity within a bone.
Term
sphenoid bone
Definition
Bat-shaped bone located at the base of the skull in front of the temporal bones.
Term
spine
Definition
A sharp projection from the surface of a bone, similar to a crest.
Term
stenosis
Definition
An abnormal condition characterized by a narrowing or restriction of an opening or passageway in a body structure.
Term
sulcus
Definition
A groove or depression in a bone; a fissure.
Term
sutures
Definition
Immovable joints, such as those of the cranium.
Term
talus
Definition
The tarsal that joins with the tibia and fibula to form the ankle joint.
Term
tarsals
Definition
The bones of the ankle.
Term
temporal bones
Definition
Form the lower sides and part of the base of the skill, contain the middle and inner ear structures.
Term
thoracic vertebrae
Definition
The 12 vertebrae of the chest, T1 through T12.
Term
tibia
Definition
The larger and stronger of the two lower leg bones. Also called the shin bone.
Term
trabeculae
Definition
Needlelike bony spicules within cancellous bone that contribute to the spongy appearance. Their distribution along lines of stress adds to the strength of the bone.
Term
trochanter
Definition
Large bony process located below the neck of the femur.
Term
true ribs
Definition
The first seven pairs of ribs, which connect to the vertebrae in the back and to the sternum in the front.
Term
tubercle
Definition
A small rounded process of a bone.
Term
tuberosity
Definition
An elevated, broad, rounded process of a bone.
Term
ulna
Definition
The second of the two lower arm bones. It is on the medial, or little finger, side of the arm.
Term
vertebral foramen
Definition
A large opening in the center of each vertebra that serves as a passageway for the spinal cord.
Term
vomer
Definition
Thin, flat bone that forms the lower portion of the nasal septum.
Term
yellow marrow
Definition
Located in the diaphysis of long bones, yellow marrow consists of fatty tissue and is inactive in the formation of blood cells.
Term
zygomatic bones
Definition
These two bones, one on each side of the face, form the high part of the cheek and the outer border of the eye orbits.
Term
osteoporosis
Definition
Means porous bones; bones that were once strong become fragile due to loss of bone density.
Term
osteomalacia
Definition
A disease in which the bones become abnormally soft due to a deficiency of calcium and phosphorus in the blood. This disease results in fractures and noticeable deformities of the weight-bearing bones. Called rickets in children.
Term
osteomyelitis
Definition
Local or generalized infection of the bone and bone marrow, resulting from a bacterial infection that has spread to the bone tissue through the blood.
Term
Ewing's sarcoma
Definition
A malignant tumor of the bones common to young adults, particularly adolescent boys.
Term
osteogenic sarcoma
Definition
A malignant tumor arising from bone. Also known as osteosarcoma, it is the most common malignant bone tumor.
Term
osteochondroma
Definition
The most common benign bone tumor.
Term
Paget's disease
Definition
A nonmetabolic disease of the bone, characterized by excessive bone destruction and unorganized bone formation by the osteoblasts.
Term
spinal stenosis
Definition
A narrowing of the vertebral canal, nerve root canals, or intervertebral foramini (openings) of the lumbar spinal canal. The narrowing causes pressure on the never roots prior to their exit from the foramini.
Term
talipes equinovarus
Definition
Clubfoot.
Term
kyphosis
Definition
An abnormal outward curvature of a portion of the spine, commonly known as humpback or hunchback.
Term
lordosis
Definition
An abnormal inward curvature of a portion of the spine, commonly known as swayback.
Term
scoliosis
Definition
An abnormal lateral (sideward) curvature of a portion of the spine. May be to the left or the right.
Term
fracture
Definition
A broken bone; a sudden breaking of a bone.
Term
closed fracture
Definition
A break in a bone but no open wound; also known as a simple fracture.
Term
open fracture
Definition
A break in a bone, as well as an open wound in the skin; also known as a compound fracture.
Term
complete fracture
Definition
A break that extends through the entire thickness of the bone.
Term
incomplete fracture
Definition
A break that does not extend through the entire thickness of the bone, one side of the bone is broken and one side is bent; also known as a greenstick fracture.
Term
compression fracture
Definition
Caused by bone surfaces being forced against each other.
Term
impacted fracture
Definition
Occurs when a direct force causes the bone to break, forcing the broken end of the smaller bone into the broken end of the larger bone.
Term
comminuted fracture
Definition
A break that occurs when the force is so great that it splinters or crushes a segment of the bone.
Term
Colles' fracture
Definition
A break that occurs at the lower end of the radius, within 1 inch of connecting with the wrist bones.
Term
hairline fracture
Definition
A minor fracture in which the bone continues to be in perfect alignment; also known as a stress fracture.
Term
pathological fracture
Definition
Occurs when a bone, which is weakened by a preexisting disease, breaks in response to a force that would not cause a normal bone to break.
Term
occult fracture
Definition
A fracture that cannot be detected by x-ray until several weeks after the injury.
Term
closed reduction
Definition
A treatment of a fracture that consists of aligning the bone fragments through manual manipulation or traction without making an incision into the skin.
Term
open reduction
Definition
A treatment of a fracture that consists of realigning the bone under direct observation during surgery.
Term
bone scan
Definition
Involved the intravenous injection of a radioisotope, which is absorbed by bone tissue. Approximately 3 hours later, the skeleton is scanned with a gamma camera moving from one end of the body to the other.
Term
bone marrow aspiration
Definition
The process of removing a small sample of bone marrow from a selected site with a needle for the purpose of examining the specimen under a microscope.
Term
dual energy X-ray absorptiometry (DEXA)
Definition
A noninvasive procedure that measures bone density. An X-ray machine generates the energy photons that pass through the bones. A computer then evaluates the amount of radiation absorbed by the bones.
Term
C1, C2, C3,...
Definition
cervical vertebrae 1, 2, 3,...
Term
DEXA
Definition
dual energy X-ray absorptiometry
Term
DIP
Definition
distal interphalangeal (joint)
Term
Fx
Definition
fracture
Term
L1, L2, L3,...
Definition
lumbar vertebrae 1, 2, 3,...
Term
LLE
Definition
left lower extremity
Term
LUE
Definition
left upper extremity
Term
MCP
Definition
metacarpophalangeal (joint)
Term
MTP
Definition
metatarsophalangeal (joint)
Term
PIP
Definition
proximal interphalangeal (joint)
Term
RLE
Definition
right lower extremity
Term
RUE
Definition
right upper extremity
Term
S1
Definition
sacrum
Term
T1, T2, T3,...
Definition
thoracic vertebrae 1, 2, 3,...
Term
THA
Definition
total hip arthroplasty
Term
THR
Definition
total hip replacement
Term
TKA
Definition
total knee arthroplasty
Term
TKR
Definition
total knee replacement
Term
TMJ
Definition
temporomandibular joint
Term
sternum
Definition
aka breastbone; flat, elongated bone that forms the midline portion of the front of the thorax.
Term
manubrium
Definition
broad upper end of the sternum
Term
scoliosis
Definition
an abnormal lateral curvature of a portion of the spine.
Term
orthopedist
Definition
physician who specializes in orthopedics
Term
chiropractic
Definition
a health care profession that deals with the diagnosis, treatment, and prevention of mechanical disorders of the musculoskeletal system, with special emphasis on the spinal column
Term
mastoid process
Definition
large projection of the temporal bone which serves as a point of attachment for muscles.
Term
medial malleolus
Definition
bony prominence on the inner aspect of the ankle
Term
acromion
Definition
somewhat spoon-shaped projection of the scapula that connects with the clavicle to form the highest point of the shoulder.
Term
lateral malleolus
Definition
bony prominence on the outer aspect of the ankle
Term
laminectomy
Definition
the surgical removal of the bony arches from one or more vertebrae to relieve the pressure on the spinal cord
Term
pelvic girdle
Definition
the bony ring formed by the hip bones with the sacrum and coccyx
Term
vertebrae
Definition
24 'backbones'; aka the spinal column
Term
clavicle
Definition
aka collarbone; a slender bone with 2 shallow curves that helps to support the shoulder by connecting laterally to the scapula and anteriorly to the sternum.
Term
zygomatic bones
Definition
form the high part of the cheek and the outer border of the eye orbits
Term
symphysis pubis
Definition
point of connection of the two pubic bones
Term
costal cartilage
Definition
means by which true ribs attach to the sternum
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