Chapter0708 - Chapters 7 8 I Introduction skeleton muscle A...

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Chapters 7 & 8 I. Introduction: skeleton & muscle A. There are 2 organ systems involved in accomplishing movement 1. Bones of the skeleton 2. Muscles B. Movement of bones is by relaxation & contraction of muscles C. There are 700 skeletal muscles which account for about 50% of body’s weight 1. 206 bones in the body 2. 270 bones at birth II. Bone protection, support, and movement A. Introduction 1. Bone is a living connective tissue having a hard matrix 2. Bone is constantly being remodeled and reshaped 3. There are several types of cells in bone tissue B. Bone tissue: structures visible to the unaided eye 1. Structure of the long bone a) Shaft (diaphysis) b) Epiphyses - ends of long bones c) Yellow marrow cavity - contains fat 2. Shaft is made of compact bone which also covers the ends of long bone 3. Spongy bone: (1) Fills space within spongy bone 4. Cartilage covers the ends of long bones where they form movable joints 5. Periosteum is a thin tough connective tissue covering the shaft of the long bone 1. Compact & spongy differ 2. Compact bone structure a) Osteocytes - bone cells embedded in the solid matrix of
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  • Fall '14
  • EricDavis
  • Bone marrow, long bones, coxal bones

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