BI13_Ch6 PP Outline

BI13_Ch6 PP Outline - 1 2 Bones and Skeletal Tissue Chapter...

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1 Bones and Skeletal Tissue Chapter 6 2 Goals Know the basic functions of bones Compare and contrast 4 bone classes Give examples Describe the texture, chemical composition, and gross anatomy of bones Tell how bones grow, develop, and remodel Describe common bone disorders Know the basic structure and function of skeletal cartilage 3 Introduction Functions of bones Classi±cation of bones 4 Support and Protect Limbs support body weight Ribs protect thoracic organs Skull protects brain 5 Movement Muscles use bones as levers to move 6 Store Minerals Calcium and phosphate “bank” Body stores minerals in bone and removes them when needed 7 Hematopoiesis Blood cell formation Occurs in red marrow cavities of some bones 8 Introduction Functions of bones Classi±cation of bones 9 Skeleton Divided Into Two Parts Axial Midline of body Protection Appendicular Limbs and girdles Movement Each bone has a unique shape to ful±ll its function 10 Long Bones Bones are longer than they are wide Shape not size Shaft plus 2 ends Most limb bones are long bones Examples Humerous
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Humerous Phalanges 11 Short Bones Bones are roughly cube shaped Examples Carpals and tarsals Wrist and ankle Sesamoid bones Forms in a tendon Example Patella 12 Flat Bones Thin, fattened and usually curved Examples Ribs Sternum Bones o± the cranium 13 Irregular Bones Bones are varied in shape and size Examples Vertebrae Coxal bones 14 Practice Test Questions Which o± the ±ollowing is not a ±unction o± the skeletal system? Movement Calcium storage Prevents dehydration How would classi±y this bone? 15 Structure o± Bones Texture Chemical Composition Gross Anatomy 16 Two Basic Types o± Bone Spongy bone Looks like honeycomb Trabeculae Space ²lled with red or yellow marrow Does not contain osteons Compact bone Appears solid Outer collar o± every bone 17 Compact Bone is Made o± Osteons
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Looks like a tree trunk Central canal in the middle Lacunae are hollow spaces housing osteocytes Bone cells Interstitial lamellae fll in gaps between osteons 18 Each Osteon Made oF Concentric Lamellae Hollow tubes oF collagen fbers ±ibers in adjacent lamella run in opposite directions Strengthens bone The central canal contains blood vessels and nerves 19 Osteocytes: Living Bone Tissue Osteocytes are immobile Canaliculi Thin canals allowing osteocytes to touch each other Cells connected by gap junctions Canaliculi are made by osteocytes Trap themselves in their own extracellular matrix 20 Structure oF Bones Texture Chemical Composition Gross Anatomy
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This note was uploaded on 08/12/2009 for the course BI 13 taught by Professor Alexasawa,ph.d during the Spring '09 term at College of the Desert.

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BI13_Ch6 PP Outline - 1 2 Bones and Skeletal Tissue Chapter...

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