Ch. 10 Joint Anatomy and Function Flashcards
where two bones meet and articulate with each other
joint
allows movement of the skeleton
joints or articulations
immovable joints
synarthroses
slight degree of movement or shifting
amphiarthroses
freely moving joints
diarthroses
fibrous joints (4)
- have no synovial cavity
- no movement between bones
- bones are joined by dense fibrous connective tissue
- may ossify (turn to solid bone)
cartilaginous joints (3)
- have no synovial cavity
- only slight movement or shifting
- bones joined by cartilage
synovial joints (3)
- have a synovial cavity
- bones joined by dense irregular connective issue at joint capsule
- bones joined by dense regular connective tissue of ligaments
fibrous joint example
skull sutures
cartilaginous joint examples (2)
- pubic symphysis
- intervertebral joints
Joint cavity (3)
- internal space around ends of bone
- created by joint capsule
- filled with synovial fluid
Synovial fluid (4)
- secreted by synovial membrane
- fills joint cavity
- lubricates articular cartilage
- reduces friction of bones
Synovial membrane (2)
- lines joint capsule
- secretes synovial fluid
Joint capsule (2)
- encloses entire area where 2 bones meet
- dense irregular connective tissue
Ligaments (3)
- strips of dense regular connective tissue
- connect bone to bone to stabilize joint
- reinforce joint capsule
Periosteum (2)
- connective tissue covering bones
- blends into joint capsule
Articular cartilage (3)
- hyaline cartilage
- covers and cushions end of each bone in joint
- prevents bones from rubbing on each other
Uniaxial joints
allow movement in only one plane
Biaxial joints
movement occurs in two planes
Multiaxial
movement occurs in all three planes
Hinge (3)
- rounded end of one bone fits concave surface of the other
- uniaxial
- allows flexion and extension
Elbow joint type
hinge
Ball-and-socket (2)
- ball-shaped head of one bone fits cup-shaped depression of the other
- multiaxial
Shoulder joint bone type
ball-and-socket
Saddle (2)
- joint surfaces fit together like rider sitting saddle
- biaxial
Carpometacarpal joint of thumb type
saddle