Skeleton Lab Essay

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1. Suture Syndesmoses Gomophosis b. A synarthrosis is a type of joint which permits very little or no movement under normal conditions. Most synarthrosis joints are fibrous. Suture joints and Gomphosis joints are synarthroses. c. Syndesmoses: there is a greater distance between the bones and more fibrous connective tissue. The tissue is either arranged as a bundle (ligament) or as a sheet (interosseus membrane). Example tibia/fibula, because it permits slight movement, a syndesmosis is classified functionally as an amphiarthrosis. Functionally, sutures are classified as synarthroses because they are immovable; syndesmoses are classified as amphiarthroses because they are slightly movable. 2. Symphyses Synchondroses b. A bar or plate of hyaline cartilage unites the bones at a synchondrosis. Virtually all synchondroses are synarthrotic. In symphyses the articular surface surface of the bone are covered with articular hyaline cartilage , which in turn is fused to an intervening pad, or plate of fibrocartilage, which is the main connecting material. Fibrocartilage acts as a shock absorber and permits a limited amount of movement at the joint. 3a Articulating bone: Articulating" means that the bones are moving relative to each other at a joint. The actual surfaces of the bones that might touch the other are the articulating surfaces, and the cartilage covering those surfaces is called articular cartilage. Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints. Articular cartilage: The cartilage covering the articular surfaces of the bones forming a synovial joint. Also called arthrodial

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