The Skeletal System Flashcards
oss/e, oss/i, oste/o, ost/o
bones
myel/o
bone marrow
chondr/o
cartilage
arthr/o
joints
ligament/o
ligament
synovi/o, synov/o
synovial membrane or fluid
burs/o
bursa
t
process that turns something into bone
ossification
t
break down bone
osteoclasts
t
rebuild the bone
osteoblasts
t
tough, fibrous tissue that forms the outermost covering of the bone
periosteum
t
(cortical bone) dense, hard, and very strong bone that forms the protective outer layer of bones; more than 75% of bone matter
compact bone
t
(cancellous bone) porous, “sponge-like,” bone that is lighter and weaker than compact bone
spongy bone
t
located within spongy bone; is a hemopoietic tissue that manufactures red blood cells, hemoglobin, white blood cells, and thrombocytes
red bone marrow
t
central cavity located in the shaft of long bones (surrounded by compact bone), where red and yellow marrow is stored
medullary cavity
t
tissue that lines the medullary cavity
endosteum
t
pertaining to the formation of blood cells
hemopoietic
t
fat storage area, located in the medullary cavity
yellow bone marrow
t
smooth, rubbery, blue-white connective tissue that acts as a shock absorber between bones
cartilage
t
covers the surfaces of bones where they articulate, or come together, to form joints
articular cartilage
t
curved, fibrous cartilage found in some joints, such as the knee and temporomandibular joint of the jaw
meniscus
t
shaft of the long bone
diaphysis
t
wider ends of long bones
epiphysis
t
an opening in a bone through which blood vessels, nerves, and ligaments pass
foramen
t
a normal projection on the surface of a bone that most commonly serves as an attachment for a muscle or tendon
process
t
(articulations) the place of union between two or more bones
joints
t
hold the bones tightly together, called “sutures” in adults, don’t allow movements
fibrous joints
t
(soft spots) normally present on the skull of a newborn
fontanelles
t
only allow slight movement and consist of bones connected entirely by cartilage
cartilaginous joint
t
allows some movement to facilitate childbirth
pubic symphysis
t
where two bones articulate to permit a variety of motions
synovial joint
t
allow a range of movement in many directions (hips, shoulders)
ball-and-socket joint
t
allow movement primarily in one direction or plane (knees, elbows)
hinge joint
t
outermost layer of strong fibrous tissue that resembles a sleeve as is surrounds the joint
synovial capsule
t
lines the capsule and secretes synovial fluid
synovial membrane
t
acts as a lubricant to make the smooth movement of the joint possible
synovial fluid
t
connect bone to bone or join bone to cartilage
ligaments
t
fibrous sac that acts as a cushion to ease movement in areas that are subject to friction
bursa
t
protects the major organs of the nervous, respiratory, and circulatory systems; 80 bones
1. bones of the skull
2. ossicles (bones) of the middle ear
3. hyoid bone, located on the throat between the chin and thyroid
4. rib cage
5. vertebral column
axial skeleton
t
protects the organs of digestion, excretion, and reproduction, 126 bones
1. upper extremities (shoulders, arms, wrists, hands)
2. lower extremities (hips, thighs, legs, ankles, feet)
appendicular skeleton
t
anything attached to a major part of the body
appendage
t
the terminal end of a body part
extremity
t
8 bones that form the cranium, 14 bones that form the face, 6 bones in the middle ear
skull
t
anterior portion of the cranium that forms the forehead
frontal
t
two of the largest bones of the skull, together they form most of the roof and upper sides of the cranium
parietal
t
back part of the skull and the base of the cranium
occipital
t
sides and base of the cranium (2)
temporal
t
the opening of the external auditory canal of the outer ear
external auditory meatus
t
irregular, wedge-shape bone at the base of the skull; makes contact with all the other cranial bones
sphenoid
t
light, spongy bone located at the roof and sides of the nose; separates the nasal cavity from the brain, and also forms a portion of each orbit
ethmoid
t
three tiny bones in each middle ear; malleus, incus, stapes
auditory ossicles
t
forms upper part of the bridge of the nose (2)
nasal bone
t
(cheekbones) articulate with the frontal bone that makes up the forehead; 2
zygomatic bone
t
forms upper jaw (2)
maxillary bone
t
forms the front part of the hard palate of the mouth and the floor of the nose (2)
palatine bone
t
makes up part of the orbit at the inner angle (2)
lacrimal bone
t
thin, scroll-like bones that form part of the inferior of the nose (2)
inferior conchae
t
forms base of the nasal septum (2)
vomer bone
t
(jawbone) the only moveable bone of the skull (2)
mandible
t
(ribcage) bony structure that protects the heart and lungs
thoracic cavity
t
12 pairs of costals that attach posteriorly to the thoracic vertebrae
ribs
t
1-7
true ribs
t
8-10
false ribs
t
11-12
floating ribs
t
(breastbone) flat, dagger-shaped bone located in the middle of the chest
sternum
t
upper portion of the sternum
manubrium
t
middle portion of the sternum
body (gladiolus)
t
cartilage that forms bottom portion of the sternum
xiphoid process
t
(collar bone) slender bone that connects the manubrium to the scapula)
clavicle
t
shoulder blade
scapula
t
extension of the scapula that forms the high point of the shoulder
acromion
t
upper bone of the arm
humerus
t
smaller and shorter forearm bone; thumbside
radius
t
larger and longer forearm bone; forms elbow joint with humerus
ulna
t
(funny bone) large projection on the upper end of the ulna
olecranon process
t
bones that form the wrist (8)
carpals
t
5 bones that form the palms of the hand
metacarpals
t
14 bones of the fingers (and toes)
phalanges
t
(vertebral column) protects the spinal cord and supports the head and body; 26 vertebrae
spinal column
t
posterior portion of the vertebra
lamina
t
the opening in the middle of the vertebra; allows the spinal cord to pass through
vertebral foramen
t
made of cartilage, separate and cushion the vertebrae from each other; act as shock absorbers and allow for movement of the spinal column
intervertebral disks
t
form the neck; C1 through C7
cervical vertebrae