BSC 1085C Chapter 5: Chapter 5: Bones and Skeletal Tissue
31 Jan 2017
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Document Summary
Do not contain blood vessels or nerve. Surrounded by epichondrium (dense connective tissue) contain blood vessels for nutrient delivery. Most abundant, absorbs pressure, provides support & exibility, transparent. Contains collagen bers, great tensile strength, absorbs pressure. Appositional growth: adding matrix to existing cartilage for growth. Interstitial growth: chondrocytes divide, secrete matrix, grows from within. Site of attachments for tendons, ligaments, and muscles. Compact bone: strong, dense outer bone layer. Spongy bone: less strong honeycomb like trabeculae. Epiphyseal: thin line of dense bone tissue separating epiphyses and diaphysis. Lled with red bone marrow but turns into yellow bone marrow in adulthood. Inner layer of periosteum is the osteogenic layer. Consisting of weigh bearing tubes called lamellae. Central canal runs through the center containing blood vessels and nerves. Spongy bones are found at sites with less mechanical stress (made of trabeculae) Most of the skeleton is preformed as hyaline cartilage. Periosteal bone replaces the cartilage: osteoblasts secretes unmineralized matrix.
