Musculoskeletal 5 Flashcards
what does the musculoskeletal system do?
maintains posture, protects vital organs, stores minerals, and generates heat
how many bones does the body have?
206
axial skeleton
bones of the head, neck, and trunk
appendicular skeleton
bones of the arms, legs, and girdles
bones meet at what
joints
bones function
storing calcium and other minerals
red blood marrow function
producing blood cells
muscles function
producing heat
bone marrow
soft tissue within bone
compact bone
harder, denser bone
diaphysis
the shaft of a long bone
endosteum
membrane lining the central medullary cavity
epiphysis
the wider ends of a longer bone
epiphysial plate
the growth area of a long bone
medullary cavity
space within a long bone’s shaft filled with bone marrow
metaphysis
section of a long bone between the diaphysis and epiphysis
osteoblast
bone-forming cell
osteoclast
bone-destroying cell
osteocyte
mature bone cell
periosteum
fibrous membrane surrounding a bone
spongy bone
mesh-like bone tissue
thorax
chest
acetabulum
the socket of the hip bone where the femur articulates
acromion
lateral upper section of the scapula that articulates with the clavicle
calcaneus
heel bone
carpal bones
the eight bones of the wrist
clavicle
collar bone
cranium
the skull
femur
thigh bone
fibula
smaller, lateral bone of the lower leg
hip bone; pelvic bone
large flat bone composed of three fused bones (ilium, ischium, and pubis) on each side
ilium
superior broad part of the hip bone
ischium
inferior, rearmost part of the hip bone
pubis
anterior lower section of the hip bone; pubic bone
humerus
upper arm bone
hyoid
U-shaped bone that supports the tongue
lamina
posterior section of the vertebral arch
mandible
lower jawbone
maxilla
upper jawbone
metacarpal bones
the five bones of the hand between the wrist and fingers
metatarsal bones
the five bones of the foot between the ankle and toes
patella
kneecap
phalanges
bones of the fingers and toes
radius
outer forearm bone
ribs
long curved bones that form the bony walls of the chest
scapula
shoulder blade
sternum
anterior bone of thorax; breast bone
tarsal bones
the seven bones of the ankle
tibia
larger inner bone of the lower leg; shin bone
ulna
inner forearm bone
vertebra
bone of the vertebral column (spine)
cervical vertebrae
7
thoracic vertebrae
12
lumbar vertebrae
5
sacrum
triangular bone consisting of five fused vertebrae inferior to the lumbar spine
coccyx
three to five fused vertebrae at the inferior end of the spine; tailbone
xiphoid process
lower section of the sternum
articulation
the site where bones come together; joint
bursa
a fluid-filled fibrous sac within some joints
cartilage
dense connective tissue attached to bone in many joints
synovial joint
a joint that moves freely and contains synovial fluid in its cavity
intervertebral disc
mass of fibrocartilage between adjacent vertebrae
ligament
band of strong connective tissue that connects bones or cartilage at a joint
meniscus
cartilage structure in the knee
suture
immovable fibrous joint found joining the skull bones
symphysis
joint that moves only slightly
synovial fluid
lubricating fluid in a freely moveable joint
tendon
band of fibrous connective tissue attaching a muscle to a bone
abduction
moving away from the body’s midline
adduction
moving toward the body’s midline
circumduction
moving in a circular manner, as when throwing a ball
inversion
turning the foot sole inward
eversion
turning the foot sole outward
dorsiflexion
bending the foot upward toward the tibia
plantar flexion
bending the foot downward to point the toes
extension
motion that increases the joint angle
flexion
motion that decreases the joint angle
pronation
turning the palm downward or the foot sole outward
supination
turning the palm upward or the foot sole upward
rotation
moving in circular direction around an axis
what are the three muscle tissues?
skeletal, smooth, and cardiac
tendons
attach muscles to bones
agonist
skeletal muscle that creates a movement by contracting
antagonist
skeletal muscle that opposes an agonist muscle and relaxes when the agonist contracts
cardiac muscle
heart muscle
fascia
sheet of connective tissue covering a muscle
fascicle
bundle of muscle fibers
insertion of muscle
end of muscle attached to bone that moves during contraction
origin of muscle
end of muscle attached to bone that does not move during contraction
smooth muscle
nonstriated, voluntary muscle tissue lining organs and blood vessels
skeletal muscle
striated, voluntary muscle tissue attached to bones
tonicity
muscle tone
ankyl/o
stiff
anthr/o, articul/o
joint
burs/o
bursa
carp/o
carpal (wrist) bones
chondr/o
cartilage
clavic/o, clavicul/o
clavicle
cervi/o
neck
cost/o
rib
crani/o
cranium, skull
disc/o
disc or disk
fasci/o
fascia, band
femor/o
femur
fibul/o
fibula
humer/o
humerus
ili/o
ilium
ischi/o
ischium
kinesi/o, kinet/o
movement
kyph/o
humpback
lei/o
smooth
lamin/o
lamina (plate)
lord/o
curved, bent
lumb/o
lumbar region, lower back
mandibul/o
mandible (lower jawbone)
maxill/o
maxilla (upper jawbone)
menisc/o
meniscus
my/o, mys/o, muscul/o
muscle
myel/o
bone marrow, spinal cord
oste/o
bone
patell/o
patella (kneecap)
pelv/i, pelv/o
pelvis, pelvic cavity