Chapter 3: Medical Terminology - The Skeletal System Flashcards
consists of bones, bone marrow, cartilage, joints, ligaments, synovial membrane, synovial fluid, and bursae
skeletal system
cells break down old or damaged bone
osteoclast
cells help rebuild the bone
osteblast
repairs minor damage to the skeletal system
ossification
act as the framework of the body, protect the internal organs, and store calcium
bone
is tough, fibrous tissue that forms the outermost covering of bone
periosteum
word root: means bone
oste
aka cortical bone. is dense, hard, and very strong bone that forms the protective outer layer of bones accounts for more than 75% of the bodys bone matter
compact bone
aka cancellous one. porous (sponge-like) which makes it lighter and weaker than compact bone.
red bone marrow is located within and commonly found in the ends and inner portions of long bones as well as the pelvic bones
spongy bone
femur and hummerus
long bones
include bones of the wrist and ankle. they are cube-shaped and made up spongy bone covered with layer of compact bone
short bones
true or false: bones with a large percentage of spongy one are weaker and more susceptible to fractures
true
the central cavity located in the shaft of long bones where it is surrounded by compact bone
red and yellow bone marrow are stored
medullary cavity
pertaining to the inner section
medullary
the tissue that lines the medullary cavity
endosteum
prefix: means within
end-
located within the spongy bone a hematopoietic tissue that manufactures red blood cells, hemoglobin, white blood cells, and thrombocytes
red bone marrow
pertaining to the formation of blood cells
hematopoietic
combining form: means blood
hemat/o
suffix: means pertaining to formation
-poietic
functions as a fat storage area. composed chiefly of fat cells and is located in the medullary cavity of long bones
yellow bone marrow
true or false: most bone marrow is red from birth through early adolescence, after which about half is gradually replaced by yellow bone marrow
true
the smooth rubbery blue-white connective tissue that acts as a shock absorber between bones
cartilage
true or false: cartilage is more elastic than bone, also makes up the flexible parts of the skeleton such as outer ear and tip of the nose
true
covers the surfaces of bones where they articulate or come together to form joints
makes smooth joint movement possible and protects bones from rubbing each other
articular cartilage
the curved fibrous cartilage found in some joints such as the knee and temporomandibular joint of the jaw
meniscus
shaft of a long bone
diaphysis
wider ends of long bones
singular-epiphysis
epiphyses
true or false: each epiphysis is covered with articular cartilage to protect it
true
the end of the bone located nearest to the midline of the body
proximal epiphysis
the end of the bone located farthest away from the midline of the body
distal epiphysis
an opening in a bone through which blood vessels, nerves, and ligaments pass
plural-foramina
foramen
spinal cord passes through the _______ of the occipital bone at the base of the skull
foramen magnum
normal projection on the surface of a bone that most commonly serve as an attachment for a muscle or tendon
process
the bony projection located on the temporal bones behind the ears
mastoid process
the place of union between two or more bones
aka articulations
joints
______ are classified according to their construction or based on degree of movement they allow
joints
consisting of inflexible layers of dense connective tissue, hold bones tightly together
fibrous joints
in adults allow little or no movement
sutures
in newborns and young children, some _______ joints are moveable before they have solidified
fibrous
aka soft spots, normally present on the skull of newborns
fontanelles
facilitate the passage of the infant through the birth canal
allows for growth of skull during the first year
fontanelles
allow only slight movement and consists of bones connected entirely by cartilage
cartilaginous joints
the ribs connect to the _______ (breast bone), these joints allow movement during breathing
sternum
allows some movement to facilitate child birth
this joint located between pubic bones in the anterior of the pelvis
pubic symphysis
created where two bones articulate to permit a variety of motions
synovial joint
_________ joints describe their type of motion
synovial
hips and shoulders allow wide range of movement in many directions
ball-and-socket joints
knees and elbows, allow movement primarily in one direction or plane
hinge jonts
_______________ consists of several components that make complex movements possible
synovial joints
the outermost layer of strong fibrous tissue that resembles a sleeve as it surrounds the joint
synovial capsule
lines the capsule and secretes synovial fluid
synovial membrane
flows within the synovial cavity, acts as a lubricant to make smooth movement possible
synovial fluid
bands of fibrous tissue that form joints by connecting one bone to another or by joining a bone to cartilage
ligaments
_____________ such as the knee are made up of a series of ligaments that permit movement in different directions
complex hinge joints
a fibrous sac that acts as a cushion to ease movement in areas that are subject to friction
plural-bursae
bursa
typical adult human skeleton consists of about ______ bones. Depending on the age of the individual, exact number of bones range from ________
206
206-350
skeleton is divided into _______ and _______ skeletal systems
axial and appendicular
protects the major organs of the nervous, respiratory, and circulatory systems. consists of 80 bones of the head and body organized into five parts
axial skeleton
1) the bones of the skull
2) the ossicles (bones) of the middle ear
3) they hyoid bone located on the throat between the chin and thyroid
4) the rib cage
5) the vertebral column
five parts of the axial skeleton
makes body movements possible and protects the organs of digestion, excretion and reproduction
consists of 126 bones organized into upper and lower extremities
appendicular skeleton
shoulders, arms, forearms, wrists, and hands
upper extremities
hips, thighs, legs, ankles, and feet
lower extremities
anything attached to a major part of the body
appendage
referring to an appendage
appendicular
terminal end of a body part
extremity
consists of 8 bones that form the cranium, 14 bones that form the fact, 6 bones in the middle ear
skull
made up of 8 bones, the portion of the skull that encloses and protects the brain
cranium
__________ are joined by jagged fibrous joints that often referred to as sutures
cranial bones
anterior portion of the cranium that forms the forehead. houses the frontal sinuses and forms the roof of the ethmoid sinuses, the nose and part of the socket that protects the eyeball
frontal bone
two of the largest bones of the skull. form most of the roof and upper sides of cranium
parietal bone
forms the back part of the skull and the base of the cranium
occipital bone
form the sides and base of the cranium there are two of them
temporal bones
opening of the external auditory canal of the outer ear. located within the temporal bone on each side of the skull
external auditory meatus
external opening of a canal
meatus
irregular, wedge-shaped bone at the base of the skull
sphenoid bone
connects with all of the the cranial bones and helps form the base of the cranium, sides of the skull, and floor and sides of the eye sockets
sphenoid bone
light, spongy bone located at the roof and sides of the nose
ethmoid bones
separates the nasal cavity from the brain and it forms a portion of each orbit
ethmoid bone
the bony socket that surrounds and protects each eyeball
orbit
three tiny bones located in each middle ear. known as the malleus, incus, and stapes
auditory ossicles
malleus, incus and stapes
bones located in the middle ear
made up of 14 bones, contain air-filled cavities known as sinuses, purpose is to lighten the weight of the skull
bones of the face
form the upper part of the bridge 2
nasal bones
aka cheek bone, articulate the frontal bone that makes up the forehead 2
zygomatic bones
form the upper jaw aka maxillae 2
singular-maxilla
maxillary bone
form anterior part of palate of the mouth and floor of the nose 2
palatine bones
makes up the orbit 2
lacrimal bones
thin, scroll-like bones that form part of the interior of the nose 2
singular-concha
inferior conchae
forms the nasal septum
vomer bone
cartilage divides the two nasal cavities
nasal septum
aka jawbone, only moveable bone of the skull attached to the skull at the temporomandibular joint
mandible
attached to the mandible abbreviated by TMJ
temporomandibular joint
aka rib cage, bony structure that protects the heart and lungs
thoracic cavity
____________ consists of ribs, sternum, upper portion of the spinal column extending from the neck to the diaphragm not including the arms
thoracic cavity
12 pairs - 24 total
ribs
aka costals, attach posteriorly to the thoracic vertebrae
ribs
word root: means ribs
cost
first seven pairs that attach anteriorly to the sternum
1-7
true ribs
3 pairs attach anteriorly to cartilage that connects them to the sternum
8-10
false ribs
last 2 pairs, only attached posteriorly to the vertebrae but are not attached anteriorly
11-12
floating ribs
aka breast bone, a flat daggered-shaped bone located in the middle of the chest
divided into three parts: manubrium, body, and xiphoid process
sternum
by joining with the ribs, the ___________ forms the front of the rib cage
sternum
bony structure that forms the upper portion of the sternum
manubrium
aka gladiolus, bony structure that forms the middle portion of the sternum
body of the sternum
structure made of cartilage that forms the lower portion of the sternum
xiphoid process
forms the pectoral girdle
shoulders
supports arms and hands aka shoulder girdle
pectoral girdle
refers to a structure that encircles the body
girdle
aka collar bone, a slender bone that connects the manubrium of the sternum to the scapula
clavicle
aka shoulder blade
scapula
an extension of the scapula that forms the high point of the shoulder
acromion
bone of the upper arm
hummerus
the smaller and shorter bone in the forearm runs up the thumb side of the forarm
think shorter distance in a circle
radius
larger and longer bone of the forarm. proximal end articulates with the distal end of the humerus to form the elbow joint
uLna-L means longer/larger
ulna
commonly known as funny bone, large proximal tip of the ulna, forms the point of the elbow and exposes a nerve that tingles when struck
olecranon
bones that form the wrist. form a narrow bony passage known as carpal tunnel. 8 of them
singular-carpal
carpals
five bones that form the palms of the hands
metacarpals
14 bones of the fingers
singluar-phalanx
phalanges
each of the four fingers has these three bones
distal, middle, and proximal
the ______ has 2 bones, distal and proximal phalanges
thumb
aka vertebral column, protects the spinal cord and supports the head of the body
spinal column
the __________ consists of 26 vertebrae, each of these is known as a vertebra
spinal column
pertaining to the vertebra
vertebrals
anterior portion is solid to provide strength
body of the vertebrae
posterior portion of the vertebrae. transverse and spinous processes extend from this area and serve as attachments for muscles and tendons
lamina
made up of cartilage and pads for tissue, separate and cushion the vertebra from each other and allow movement of the spinal column
intervertebral disks
inner core made up of soft gelatinous material that allows intervertebral disks to act as shock absorbers
nucleus pulposus
first 7 vertebra, they form the neck.
C1-C7
cervical vertebrae
pertaining to the neck
cervical
known as T1-T12, second set of 12 vertebra. each vertebra has a pair of ribs attached to it, forming the outward curve of the spine
thoracic vertebra
pertaining to the thoracic cavity
thoracic
known as L1-L5, third set of vertebra, and form the inward curve of the lower spine. these are the largest and strongest and bear the most of the bodys weight
lumbar vertebrae
relating to the part of the back and sides between the ribs and the pelvis
lumbar
the remaining two vertebra
sacrum and coccyx
slightly curved triangular-shaped bone near the base of the spine that forms the lower portion of the back
sacrum
true or false: at birth, the sacrum is composed of five separate bones but in young children they fuse together to form a single bone
true
aka tailbone, the end of the spine and is actually made up four small vertebra that are entirely or partially fused together
coccyx
aka bony pelvis, protects internal organs and supports lower extremities
pelvis
the _______ and _______ includes the pelvic girdle
sacrum and coccyx