Chapter 3 Articular System Flashcards
Joint
Connection between two bones. Allows motion, absorb force and provides stability
Fibrous Joint
Thin layer of fibrous periosteum between two bones. 3 types- synarthosis, syndesmosis, gomphosis
Synarthosis
Suture joint: no movement, fubrous suture, ex. skull bones
Syndesmosis
slight motion (twisting, bending), firbrous-ligamentous, ex. radius, ulna
Cartilaginous Joint = Amphiarthodial
Hyaline or fibrocartilage between two bones, little motion (bend, twist, compression), ex. symphysis pubis, vertebrae
Synovial Joint = Diarthrodial
Allows free motion, filled with synovial fluid, joint capsule, smooth articular surface ex. hip, knee, elbow
Nonaxial
Linear movement (not angular)
Gliding motion
Joint surfaces flat
example: Intercarpal
Biaxial
2 axes, 2 planes
Condyloid or saddle
example: Metacarpophalangeal and radiocarpal
Uniaxial
1 axis, 1 plane
Hinge or pivot
example: elbow and interphalangeal joints
Triaxial/ Multiaxial
3 axes, 3 planes
Ball and socket
example: hip and shoulder
Types of synovial joints
Plane Hinge Pivot Condyloid Saddle Ball and Socket
Joint Structure
Bones Ligaments Synovial Fluid Cartilage Muscles Bursae (Know where to label these)
Hyaline = Articular Cartilage
Ends of opposing bones
Smooth articular surface
No blood supply or nerve supply
Nutrition from synovial fluid
Fibrocartilage
Shock absorption, important in weight bearing joints
Example: menisci knee, disk between sternum and clavicle, labrum, IV disks
Elastic Cartiage
Certain amount of motion
Example: symphysis pubis, larynx
