Anat chapter 6 bone.pdf - Chapter 6 Bone Tissue and Skeletal System By Touran Zarrabi Functions of bone Support structural framework of the body

Anat chapter 6 bone.pdf - Chapter 6 Bone Tissue and...

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Chapter 6 Bone Tissue and Skeletal System By Touran Zarrabi
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Functions of bone Functions of bone Support - structural framework of the body Supports soft tissues, provides attachment points Protection of critical soft organs of the body Cranium protects brain; rib cage protects heart, lungs Aids in movement (origins and insertions for muscles) Mineral homeostasis Storing minerals such as Ca 2+ and Mg 2+ Hematopoiesis production of blood formed elements Triglyceride storage in yellow bone marrow
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Bone marrow Bone marrow Red bone marrow consists of hematopoietic stem cells bone matrix, fibers, etc. HSCs differentiate into any type of formed element Found in the pelvis, ribs, skull, long bones, etc. With aging, red bone marrow turns to yellow Yellow bone marrow is mainly adipocytes Most bone marrow in older adults is yellow Serves as energy reserve
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Red & yellow bone marrow
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Classification based on shape
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Types of bones
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Long bone structure Diaphysis of tibia Epiphyseal plate Epiphysis of tibia
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Structure of long bones Periosteum – outer bone covering of DWFCT Blood & nerve supply; tendon/ligament attachment Fibroblasts; collagen and elastin fibers Perforating fibers enter bone matrix for strong bond Medullary cavity – hollow space within the diaphysis Yellow marrow is stored here Endosteum – inner membrane; lines medullary cavity Blood vessels, osteoblasts, fibers Bone repair & remodeling occur here
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Practice questionA fracture (bone break) occurs in the exact middle of a long bone. The part of the bone affected is:
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