Exam 1 Flashcards
Joint mobility vs stability
mobility - unstable
immobile - stable
most mobile joint
shoulder
most immobile
suture
synarthrosis joint
immovable
amphiarthrosis joint
slightly movable
diarthrosis joint
freely movable
fibrous joint
connected by fibrous tissue
cartilaginous joint
connected by cartilage
synovial joint
contains a fluid filled joint cavity
structure of diarthrosis
synovial joint
structure of synarthrosis and amphiarthrosis
fibrous, cartilaginous
three types of fibrous joints
suture, gomphosis, syndesmosis
suture
synarthrotic
gomphosis
synarthrotic
peg in socket joint
tooth in gums
syndesmosis
amphiarthrotic
bone more widely separated - held by connective tissue
tibia/fibula + ulna/radius
types of cartilaginous joints
synchondroses, symphyses
synchondroses
synarthrotic
joined by hyaline cartilage
rib and manubrium
symphyses
amphiarthrotic
connected by fibrocartilage
between vertebrae
synovial joint
diarthrotic
knee
articular disc
fibrocartilage structure between articulating bone - temporomandiubular joint
bursa
connective tissue sac filled with lubricating fluid
padding between joint - protect tendon from underlying bone
tendon sheath
surround muscle tendon where tendon crosses joint
hold from popping out
menisci
padding of the joint
large c shape
muscle
stabilize the joint
pivot joint
rounded portion enclosed with ring
rotation around ring
atlas, axis vertebrae
hinge joint
end of one bone, concave other
bend and straighten along single axis
trochlear notch, humerus, knee, ankle, finger, toe
condyloid joint
shallow depression with round structure
knuckle, hand
bend, side to side movement
saddle joint
both have saddle shape
rider on saddle
thumb, sternoclavicular joint
plane joint
flat or slightly curve on both bones
small, tightly constrained
carpal bones, clavicle + acromion
ball and socket
round head, concave
hip and shoulder
ACL
restrict anterior displacement of tibia on femur
PCL
restrict posterior displacement of tibia on femur
LCL
prevent varus (outside) force on knee joint
MCL
prevent valgus (inside) force on knee joint
meniscus
shock absorption
patellar tendon
patella to tibia connection
bursitis
inflammation of bursa
blow or friction
tendonitis
inflammation of tendon or tendon sheath due to overuse
sprain
joint reinforcing ligaments are stretched or torn
dislocation
bones force out of alignment
torn cartilage
tearing of meniscus or articular cartilage is repaired with surgery
arthritis
inflammatory or degenerative disease that damage joints
osteoarthritis
chronic degenerative condition, wear and tear of articular cartilage
rheumatoid arthritis
autoimmune disease, chronic inflammatory disorder
finger (interphalangeal)
synovial, hinge, diarthosis
knuckle (metacarpophalangeal)
synovial, condyloid, diarthosis
knee (tibiofemoral)
synovial, hinge, diarthosis
axial skeleton
skull, vertebral column, thoracic cage
appendicular skeleton
pectoral girdle, upper limb, pelvic girdle, lower limb
skull
frontal, parietal, temporal, sphenoid, ethmoid, lacrimal, nasal, zygomatic, maxilla, mandible
cranial fossae
anterior cranial fossa, middle cranial fossa, posterior cranial fossa
coronal suture
straight across on crown
lambdoid suture
back suture
sagital suture
middle split left and right
squamous suture
over temporal bone
fontanelle
soft spot on infants head
disappears by age 2
anterior fontanelle
right on top - coronal and parietal suture
sphenoid fontanelle
by frontal and temporal bone
mastoid fontanelle
temporal and occipital
posterior fontanelle
occipital and parietal
Ethmoid sinus
under cribriform plate
frontal sinus
above eyebrows
maxillary sinus
within maxillary bone
sphenoid sinus
midline sinus
sinus functions (4)
make skull lighter
resonate sound
lined with mucous membrane
mucus drains into nasal cavity warms and humidifies the air
four vertebral curvatures from superior to inferior
cervical curvature - concave posterior
thoracic curvature - concave anterior
lumbar curvature - concave posterior
sacral curvature - concave anterior
regions of the vertebrae
cervical, thoracic, lumbar, sacrum, coccyx
cervical vertebrae
7
thoracic vertebrae
12
lumbar vertebrae
5
scoliosis
lateral curvature, twisting of vertebrae (s)
anterior longitudinal ligament
anterior side
resist excess backward bending
supraspinous ligament
posterior side
support vertebral column during bending
posterior longitudinal ligament
anterior to spinal cord
support vertebral column bending forward
ligamentum flavus
posterior to spinal cord
support vertebral column bending forward
anulus fibrosus
tough outer layer of the disc
nucleus pulposus
gel- like material on inside
herniated disc
nucleus pulposus protrudes through anulus fibrosis
most common place for herniate disc
between L3 and L4
true ribs
1-7
false ribs
8-12
floating ribs
11-12
pectoral girdle
clavicle and scapula
bones are light and thin
connect to axial skeleton at sternoclavicular joint - highly moveable
upper limb
humerus, radius, ulna, carpals, metacarpals, phalanges
how many carpals in hand
8
how many metacarpals in hand
5
how many phalanges in hand
14
pelvic girdle
os coxae
bones heavy and thick
axial skeleton at sacroiliac joint
lower limb
femur, patella, tibia, fibula, tarsals, meta tarsals, phalanges
how many tarsals in foot
7
how many metatarsals in foot
5
how many phalanges in foot
14
characteristics of cartilage
semirigid, weaker than bone
flexible yet resilient - elastic fibers
avascular -no blood vessels
nutrients through diffusion
functions of cartilage
support soft tissue
articular surface for joints
mode for endochondral bone formation
condroblast
cells that produce cartilage matrix
chondrocyte
mature cartilage cells that reside in lacunae
extracellular matrix
protein fibers embedded in gel like ground substance
perichondrium
dense irregular connective tissue
structure of cartilage superior to inferior
perichondrium
chondroblast
chondrocyte
extracellular matrix
hyaline cartilage
flexible but resilient
where is hyaline cartilage?
larynx
trachea
bronchi
costal cartilage
nose
articular cartilage
epiphyseal plate
fetal skeleton
fibrocartilage
thick collagen fibers
shock absorber
where is fibrocartilage
intervertebral disc
pubic symphysis
menisci
articular disc of jaw
elastic cartilage
contain elastic fibers
provides flexibility
where is elastic cartilage
epiglottis and external ear
least abundant
Bone matrix
osseous connective tissue
bone cell
osteocytes
bone matrix organic
osteoid - collagen and other proteins
bone matrix inorganic
hydroxyapatite - calcium phosphate and calcium hydroxide
functions of bone
support body - framework
protect vital organs
facilitate movement
hematopoiesis - red bone marrow
mineral and energy storage
long bone
longer than wide
function - lever, move when muscles contract
short bone
cube shape
functions - stability and support
limited motion
flat bone
thin, or curved
point of attachment
protect internal organs
irregular bone
not easily characterized
vertebrae - support spinal cord, compressive force support
sesamoid bone
small round bone, form in tendons
feet, hand knee
patella only universal one
long bone example
humerus, femur, tibia, metatarsals
short bone example
carpal, tarsal
flat bone example
skull, scapulae, sternum, rib
irregular bone example
vertebrae, sacrum, coccyx, os coxae, ethmoid, sphenoid
sesamoid bone
patella, small bones in tendons
articular cartilage
cover epiphyses
reduce friction, shock absorber
apophysis
bony outgrowth - attachment site for ligament/ tendon
metaphysis
where epiphysis meets the diaphysis
spongy bone
fills epiphysis
endosteum
membranous lining
growth, repair, remodeling occur
compact bone
walls of diaphysis
diaphysis
tubular shaft
periosteum
outer surface of bone
medullary cavity
hollow region filled with yellow marrow
epiphyseal line
bone stops growing cartilage replaced by osseous tissue and plate is epiphyseal line
distal epiphysis
wide section at end of bone filled with spongy bone
compact/cortical bone
lined by periosteum
composed of osteons
spongy/ cancellous bone
lined by endosteum
composed of trabeculae
red bone marrow
flat bone structure
periosteum, compact, spongy, compact, periosteum
osteocyte
maintains bone tissue
osteoblast
forms bone matrix - build and maintain bone
osteogenic cell
stem cell