Joints of the Musculoskeletal System Flashcards
what are joints also called
articulations
what is a joint
union or junction b/w 2 bones
what are the types of movement a joint could allow
no movement (epiphyseal plates of growing long bone b/w diaphysis and epiphysis)
slight movement (teeth w/in their sockets)
freely moveable (shoulder joint)
3 types of joints
fibrous
cartilaginous
synovial
what are fibrous joints
2 types
-syndemosis
-gomphosis
what is a syndemosis joint
fibrous joint
sheet of fiber joining 2 bones together
ex: sutures of the cranium or in b/w radius and ulnar
what is a gomphosis joint
fibrous joint
dentialveolar syndemosis
fibrous joint where root of the tooth fits into socket in the bone of the jaw
what are cartilaginous joints
articulating structures are united by either hyaline or fibrocartilage
what are the 2 types of cartilaginous joints
primary and secondary
what is a primary cartilaginous joint
synchrondosis
bones are united by hyaline cartilage
usually temporary
what is a secondary cartilaginous joint
symphysis
strong, slightly moveable, provide shock absorption
bones united by fibrocartilage
what are synovial joints
most common joints
provides free movement
what are the structural aspects of a synovial joint
joint capsule
synovial fluid
articular cartilage
inside the capsule
outside the capsule
accessory ligaments
special features
what is the joint capsule
articular capsule
unites the bones
encloses the articular joint cavity
outer fibrous layer
has a synovial membrane (inner layer of the joint capsule)
what is the synovial fluid
secreted by the synovial membrane
acts as a lubricant to the joint
