Objective 10
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Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Objective 10 Name the six types of synovial joints based on the movements they allow.
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Objective 10. Name the six types of synovial joints based on the movements they allow. Features of Synovial Joints. Articular cartilage (hyaline cartilage) covers the ends of bones Joint surfaces are enclosed by a fibrous articular capsule Have a joint cavity filled with synovial fluid - PowerPoint PPT Presentation
Transcript of Objective 10
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Objective 10
Name the six types of synovial joints based on the movements they allow.
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Features of Synovial Joints Articular cartilage (hyaline cartilage) covers the
ends of bones Joint surfaces are enclosed by a fibrous articular
capsule Have a joint cavity filled with synovial fluid Ligaments reinforce the joint Bursae – flattened fibrous sacs
Lined with synovial membranes Filled with synovial fluid
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The Synovial Joint
Figure 5.28
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Plane Joint1. Plane joints
Articular surfaces are essentially flat
Allow only slipping or gliding movements
Small bones of Wrist & ankle
Figure 8.7a
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Types of Synovial Joints2. Hinge joints
Cylindrical projections of one bone fits into a trough-shaped surface on another
Motion is along a single plane permit flexion and extension only Examples: elbow and interphalangeal
joints
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Hinge Joints
Figure 8.7b
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3. Pivot JointsRounded end of one bone protrudes into a
“sleeve,” or ring, composed of bone (and possibly ligaments) of another
Will rotate on an axis Examples: joint between the axis and the
atlas (neck) , and the proximal radioulnar joint (forearm)
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Pivot Joints
Figure 8.7c
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4. Condyloid or Ellipsoidal Joints Oval surface of one bone fits into a
depression in another Both articular surfaces are oval Biaxial joints permit all angular motions Examples: radiocarpal (wrist) joints, and
metacarpophalangeal (knuckle) joints
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Condyloid or Ellipsoidal Joints
Figure 8.7d
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5. Saddle Joints Similar to condyloid joints but allow greater
movement Each articular surface has both a concave and
a convex surface Example: carpometacarpal joint of the thumb
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Saddle Joints
Figure 8.7e
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6. Ball-and-Socket Joints A spherical or hemispherical head of one
bone articulates with a cuplike socket of another
Multiaxial joints permit the most freely moving synovial joints
Examples: shoulder and hip joints
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Ball-and-Socket Joints
Figure 8.7f
