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Joints (articulations)
-places where two or more bones will meet or come together, functional junctions to
joints
Levers
-the bones and muscles work as a mechanical device to produce body movement
4 Lever Components
-rigid bar/rod
-pivot of fulcrum/axis (bar turns)
-resistance
-energy to move bar
Third Class Lever
-Most levers in the body are 3rd Class
-force is between pivot and resistance
Ligament
-connective tissue that attaches the bones together (bone to bone)
-prevents excessive movement
-Strong collageneous fibers
-thickenings in fibrous layer of Outside capsule
Tendon
-flexible collagen tissue that attaches muscle to bone
Classification of Joints
-Types of Tissue in Joint
-Degree of Movement in Joint
3 Joint Tissues (FCS)
-Fibrous (tight, thin, little, close together knit or no movement) *skull sutures
-Cartilaginous (hyaline/fibrocartilage, shock absorber, some movement) *vertebrae
-Synovial (very movable, always diarthroses, cartilage) *
Degree of Movement Joints (SAD)
-Synarthrodial (Immovable)
-Amphiarthrodial (Semi-movable)
-Diarthrodial (Freely Movable)
Types of Synovial Joints (6)
-Ball and socket (globular and cup shaped, full circumduction) *hip, shoulder
-Condyloid (a bone is oval -shaped and can fit in another bone) *metacarpals
-Gliding (a flat bone, or slightly curved) *carpals
-Hinge joint (concave suface, that only one plane movement) *elbow
-Pivot (cylindrical surface, bone rotates in another) *neck movement w/vertebrae
-Saddle (concave bone that sits on another like a rider on a saddle) * thumb/metacarpal
joint
Ball and Socket (Synovial Joint)
(globular and cup shaped, full circumduction) *hip, shoulder