CH 5 SKELETAL SYSTEM

CH 5 SKELETAL SYSTEM - SKELETAL SYSTEM SKELETAL SYSTEM...

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Unformatted text preview: SKELETAL SYSTEM SKELETAL SYSTEM FUNCTIONS Support (Primary function) Movement (Passive) Protection of Vital Organs Mineral Storage Blood Cell Formation (Hematopoiesis or Hemopoiesis) OSSEOUS C.T. Compact (dense) Bone- Hard & heavy- Forms surface & diaphysis- Osteons = building blocks Cancellous (spongy) Bone- Lightweight- Fills epiphyses, Contains red marrow- Trabeculae = building blocks Matrix- Mineral Salts (hardness)- Collagen (strong & flexible) Bone Cells Osteoblasts Secrete to form bone Osteocytes * Mature bone cells * Trapped osteoblasts Osteoclasts destroy bone * Enzymes digest protein * Acids dissolve minerals * Forms Marrow Cavity; Involved in Remodeling SKELETAL DIVISIONS Axial Appendicular Classification: Shape & Location Long Short Flat Irregular Sesamoid (develop in tendons; patella ) Sutural (between cranial bones) LONG BONE ANATOMY Diaphysis = shaft made of compact bone Epiphyses = ends filled with spongy bone containing red marrow Articular cartilage covers epiphyses Epiphyseal line indicates earlier location of epiphyseal (growth) plate LONG BONE ANATOMY Periosteum is C.T. covering bone Nutrient Foramina wholes allowing for penetration of arteries Medullary cavity contains yellow marrow Endosteum is C.T....
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This document was uploaded on 06/04/2011.

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CH 5 SKELETAL SYSTEM - SKELETAL SYSTEM SKELETAL SYSTEM...

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