Chapter 8: Articulations Flashcards
Articulations
Where bones meet
°allow movement
°provide stability
°allow long bones to lengthen (epiphyseal plate)
Function classification
Based on movement
(3 of them)
°Synarthrosis
°Amphiarthosis
°Diarthrosis
Synarthrosis
No moment
Amphiarthrosis
Alittle movement
Diarthrosis
A wide range of motion
Structural classification
Based on structural features
(3 of them)
°Fibrous joints
°Cartilaginous joints
°Synovial Joints
Fibrous Joints
°Dense regular collagenous conective tissue
° synarthrosis and amphiarthrosis
Cartilaginous Joint
°Cartilage
°synarthrosis and amphiarthrosis
Synovial joints
°Fluid-filled joint capsule with hyaline cartilage at articular ends.
°Diarthrosis
Fibrous Joints
(3 types)
°Suture
°Gomphosis
°Syndesmosis
Suture
Fibrous CT between flat bones of cranium (immovable)
Gomphosis
Tooth in bony socket (periodontal ligament) immovable joint
Syndesmosis
Joint between tibia and fibula, ulna and radius (interosseous membrane) slightly movable
Cartilaginous joints
(2 of them)
°synchondrosis
°symphsis
Synchondrosis
°Hyaline cartilage
°Synarthrosis (immovable)
°Found in the cartilage of ribs, sternum, and epiphyseal plate)
Symphysis
°Fibrocartilaginous pad
°amphiarthrosis (little movement)
°Found in intervertebral joints and pubic symphysis
Synovial Joints
(3 types)
°Joint cavity (synovial cavity)
°Articular capsule
°Articular cartilage
°Diarthorsis
°allow more mobility
° less stable than other joints
Joint cavity
(Synovail cavity) space found between articulating bones.
Articular Capsule
Double layered structure
°Outer fibrous layer
°Innerlayer synovial membrane that has synovial fluid
Articular Cartilage
°Hyaline cartilage
°Covers exposed articular bones with a joint
Structures that provide additional stabilization (3 of them)
Ligament
Tendon
Bursae and tendon sheaths
Ligaments
Dense regular CT connects bone to bone