Chapter 9: Articulations

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8 Terms

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Functional class - Synarthroses

Immovable joints

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Functional class - Amphiarthroses

joints that allow some motion

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Functional class - Diarthroses

Freely movable joints

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Structural class - Fibrous joints

Consist of bones joined by short collagen fibers

  • MOST allow no motion and are synarthroses

  • Main function is to provide stability between bones

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What are the three subclasses of fibrous joints?

  1. Sutures

  2. Gomphosis

  3. Syndesmosis

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Sutures

One of the three fibrous joints

  • A joint between two bones of the skull

  • The interlocking wavy ridges are united by short collagen fibers

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Gomphosis

One of the three fibrous joints

  • Located between a tooth and its alveolus in the mandible or maxilla

  • Held in place by a fibrous membrane called the periodontal ligament

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Syndesmosis

One of the three fibrous joints

  • Located between two parallel articulating bones (EX. The radius and ulna)

  • Joined by a long fibrous membrane called an interosseous membrane

  • Some move allowed, so classified as amphiarthroses