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Articulation
Articulation—
site where two or more bones meet
Functions of joints
Functions of joints:
Give skeleton mobility
Hold skeleton together
Functional Classification of Joints
FUNCTIONAL
STRUCTURAL
Three
FUNCTIONAL
classifications:
immovable (synarthrosis)
slightly movable (amphiarthrosis)
freely movable (diarthrosis)
Three
STRUCTURAL
classifications:
Fibrous (mainly immoveable)
Cartilaginous (partially moveable)
Synovial (freely moveable)
SUTURE
Joint held together with very short,interconnecting fibers, and bone edgesinterlock. Found only in the skull.
Syndesmosis
Joint held together by a ligament.
Fibrous tissue can vary in length, but is longer than in sutures.
Gomphosis
“Peg in socket” fibrous joint.
Periodontalligament holds tooth in socket.
Cartilaginous Joints
Two types
Synchondroses
Bones united by hyaline cartilage
Symphyses
Bones united by fibrocartilage
Synovial Joints
All are freely moveable (diarthrotic)
Include all limb joints; most joints of the body
All have:
--Joint capsule lined with synovial membrane
--The synovial membrane produces fluid
--Ligaments (inside and outside joint)
Bursae
Bursae
--Extra fibrous sacs lined with synovial membranes, and containing synovial fluid
--Placed where ligaments, muscles, skin, tendons, or bones rub together to reduce friction at joint
Author
Brytelot
ID
9896
Card Set
Joints
Description
LIL INFO ON JOINTS
Updated
2010-03-10T19:38:18Z
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