9-12-06 CARTILAGE AND BONE

9-12-06 CARTILAGE AND BONE - CARTILAGE AND BONE CARTILAGE...

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CARTILAGE AND BONE CARTILAGE STRUCTURE Protein Fibers o Collagen and Elastin Ground Substance – will find 3 specific substances to cartilage o Chondroitin Sulfate o Hyaluronic acid o Chondronectin Cells found in Cartilage are chondrocytes NON VASCULAR with no nerves CLASSIFICATION Fibrocartilage (Fig. 4.12i) o Has same consistency of dense regular connective tissue o Can withstand vertical compression o Found in intervertebral discs and discs of knee joint Hyaline cartilage (Fig. 4.12g) – Matrix has a very glassy look made of collagen o Most abundant type of cartilage o Springy and absorbs shock well o Found on ends of bones, where two bones meet, costal cartilages (where ribs join sternum), nose, trachea, and parts of larynx Elastic Cartilage (Fig 4.12h) – looks similar to hyaline cartilage except matrix made of elastin o Very stretchy and moveable o Found in external ears and epiglottis BONE (Fig 6.3) FUNCTIONS Support Protection Movement Mineral storage (Calcium in particular) Blood cell formation (hematopoiesis or hemopoiesis) o Produced by bone marrow CLASSES OF BONES (Fig 6.2) Long (Humerus and Femur) Short (Carpals and Tarsals) Flat (Sternum and Ribs) Irregular (Vertebrae and hip bones) STRUCTURE OF LONG BONES Diaphysis = shaft Epiphysis = ends
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