Classification Of Joints - Structural and Functional | Biology Hubspot - Definition and Examples of Biology Terms

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Saturday, February 23, 2019

Classification Of Joints - Structural and Functional

Classification Of Joints

Joints are classified both structurally and functionally. The structural classification of joints is based on the two criteria
  • Whether there is a space between the articulating bones or not.

  • Type of the connective tissue that finds the articulating bones.

Structural classification of joints

  • Fixed or fibrous joint: - It lacks synovial cavity and the articulating bones are held together by the fibrous tissue. E.g. sutures in the skull bones, the joint between the tooth and jawbone (Gomphosis), syndesmosis is another fibrous joint between the radius-ulna and tibia-fibula.

  • Imperfect or cartilaginous joint: - It also lacks synovial cavity and the articulating bones are connected by either by hyaline cartilage or fibrocartilage.

    The examples of cartilaginous joints are pubic symphysis, ribs, sternum, epiphyseal plate, and intervertebral joints.

  • Freely movable or Synovial joint: - The characteristic feature that distinguishes this joint from others is the presence of synovial cavity between articulating bones. This cavity enables a wide range of movements.

    The articulating bones in a synovial joint are united together by an articular capsule and by accessory ligaments.

    Synovial joints include hip joint, shoulder joint, carpometacarpal joint, radio-carpal or wrist joint, elbow joint, knee joint etc…

  • Functional classification of joints

    • Synarthroses:- These are immovable joints and provide a strong articulation between bones for protection of vital organs.

    • Amphiarthroses: - These are slightly movable joints that allow a limited amount of movement.

    • Diarthroses: - Are freely movable joints and include all synovial joints of the body which provide the majority of body movements.

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