Articulations
where 2 bones interconnect (Joints)
-holds bones together
2 Ways to classify joints
A. Structural Classification of Joints
B. Functional Classification of joints
A. Structural Classification of Joints
based on structure of holding bones together
B. Functional Classification of Joints
based on range of motion
synarthroses
immovable
- synotosis
- synchondroses
amphiarthroses
slightly movable
- syndesmoses
- symphysis
diarthroses
freely movable
-synovial
Articular cartilage
- resemble hyaline cartilage
- no perichondrium
- prevent bone-bone contact
Joint Cavity =
synovial cavity
Lining joint cavity
- Articular Caspsule
- Synovial membrane
Synovial Cavity
fills cavity
- secreted by firbroblasts
- lubs
- nutrient distribution
- shock absorption
Menisci
wedges of fibrocartilage sperating articular cartilage
-channel flow of synovial fluid
Fatty pads
btwn fibours capsule and synovial membrane
- protect
- packing material
Ligaments
stregthen and support the joint reinforcement
Bursae
fluid-filled pockets
Tendon Sheath
wraps around joint
Factors that Stabilize Synovial Joints
Articular Sheaths shapes
- Collagen fibres
- presence of other bones
- tension in tendons
Luxation =
dislocation
Sensory neurons NOT in
joint cavity
Ball and Socket
triaxial
-shoulder
Sprain
ligament stretched or torn
Cartilage injuries
wear n’ tear
-can occur through injury
Dislocation
bones force out of alignment
Bursitis and Tendonitis
inflammation of bursa or tendon sheath
-friction or distortion over time
