4d - Skeletal System; Joints Flashcards
a joint is
where two or more bones meet
ligament is
connecting bone to bone
tendon is
connecting muscle to bone
joints tissue types (3)
fibrous
cartilaginous
synovial
amount of movement (3)
synarthrosis - little or no movement
amphiarthrosis - slight movement
diarthrosis - freely mobile
arthrosis means
joint
fibrous joint united by
irregular dense connective tissue
fibrous joint movement
immovable (synarthrosis)
fibrous joint example
skull - sutures
cartilaginous joints also known as
fibrocartilage
cartilaginous joints movement (2 types with examples)
little movement - pelvic symphysis and mandibular symphysis
some movement - between vertebrae bodies and between sternebrae
synovial joints movement
wide range of mobility
synovial joints bones seperated by what
joint cavity
what is the joint cavity
a space filled with synovial fluid (where bones are separated in synovial joint)
what is synovial fluid secreted by
synovial membrane
synovial fluid purpose (2)
lubricate joint
provide nutrition to hyaline cartilage
what does hyaline cartilage cover
bone surface
synovial fluid structure
straw coloured viscous fluid - looks like egg white
what three types of ligament found in synovial joints
collateral
intrascapular
cruciate
collateral ligaments purpose and location
stabilisers on either side of joint
instrascapular ligaments purpose and location
stabilisers inside the joint
menisci are
structures in synovial joint that cushion and spread load evenly - shock absorbers
menisci found
in stifle joint
types of synovial joints (5)
ball and socket
pivot
hinge
condylar
gliding
ball and socket joint function and examples
great range of movement
e.g. hip and shoulder
pivot joint function and examples
allows rotation
e.g. atlanto - axial joint (cervical vertebrae)
hinge joint function and examples
movement in one plane
e.g. elbow and tarsus
condylar joint function and examples
movement mainly in one plane and may be little side to side
e.g. stifle
sliding joint function and examples
surfaces slide over each other
e.g. joints between rows of carpal and tarsal bones
which bones make up the shoulder joint
scapula and humerus
which bones make up the elbow joint
humerus, radius and ulna
which bones make up the carpal joint
radius, ulna, carpals and metacarpals
which bones make up the hip joint
pelvis and femur
which bones make up the stifle joint
femur, tibia and patella
which bones make up the tarsus joint
tibia, fibula, tarsus and metatarsus
ligaments are
connecting bone to bone
ligaments stabilise
joints
2 main ligament types
extra-capular ligament and intra-capular ligament
extra-capular ligament function
provide joint stability
extra-capular ligament examples
collateral and patellar ligaments
intra-capular ligament function
provide stability and permit movement
intra-capular ligament example
cruciate ligaments
2 joint movements
flexion and extension
flexion is
bending (reducing angle between bones)
extension is
straightening (increasing angle between bones)
4 limb movements
abduction
adduction
protraction
retraction
abduction is
out sideways
adduction is
towards body
protraction is
limb forwards
retraction is
limb backwards