PSIO #9 Lecture REAL

Joint capsule is attached to periosteum this is what

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Unformatted text preview: that give rise to other bone cells. Joint capsule is attached to periosteum. This is what is meant by the fact that its is "continuous" with other structures. Endosteum • Lining inner surfaces of bone including marrow cavity, trabecullae of spongy bone, canals of compact bone This is within the marrow cavity. Similar composition, but without the fibrous layer because it does not need it. • Contains osteogenic cells important for bone growth and remodeling Endosteum Osteogenic cells are only there if we need to break down bone BUT ARE NOT ALWAYS THERE. Being lined with endosteum allows the bone to change. Composition of bone • “Osteo” = bone • Osteology – the study of bone tissue Connective tissue Extracellular Matrix Ground Substance Fibers Contains organic and inorganic components (GAG, water, minerals) Collagen Fibers (organic) Cells Osteogenic cells Osteoblasts Osteocytes Osteoclasts Connective tissue Cells Important in bone remodeling Osteogenic cells Osteoblasts Osteocytes Osteoclasts Osteogenic (osteoprogenitor) cells • Stem cells that are formed from mesenchyme (embryonic connective tissue) Mitosis Osteogenic cells Daughter osteogenic...
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