TOPIC 6 Bone tissue presentation 2009

TOPIC 6 Bone tissue presentation 2009 - Osseous tissue...

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Osseous tissue z Lecture outline z General functions of bone and the skeletal system z Microscopic anatomy z Gross anatomy z Physiology of embryonic bone formation z Physiology of bone growth, repair, remodelling z Gross anatomy of bones
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Functions of bones/skeletal system z Support the body and cradle internal organs z Protect the brain, spinal cord, thoracic organs z Move the body and its parts z Store minerals (calcium and phosphate) z Site of blood cell formation z Hemopoiesis
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Bone Marrow z Location z medullary cavity of a long bone z amid the trabeculae of spongy bone z Red marrow z mesh of reticular fibers and cells z is hemopoietic : hemocytoblast gives rise to all formed elements of blood z found in axial skeleton, pelvic girdle and proximal heads of femur and humerus in adults z Yellow marrow z fatty marrow of long bones in adults
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Cellular components of the osseous tissue Osteogenic cells Osteoblasts Osteocytes
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Cellular components of the osseous tissue Osteoclasts
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Extracellular components of Osseous Tissue z Matrix z Organic matter 1/3 z Osteoid secreted by osteoblasts z collagen fibers z z tensile strength: resists stretch and twisting z Inorganic matter 2/3 z 85% hydroxyapatite (crystallized calcium phosphate salt) z other minerals (fluoride, sulfate, potassium, magnesium) z hardness: resists compression
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Compact Bone Spongy Bone
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Structure of Bones Epiphysis Diaphysis Epiphysis Long Bone Flat Bone Spongy bone Diploe
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This note was uploaded on 06/05/2011 for the course KINS 2531 taught by Professor Sturges during the Spring '11 term at Georgia Southern University .

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TOPIC 6 Bone tissue presentation 2009 - Osseous tissue...

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