chapt11LectureOutlines

chapt11LectureOutlines - Chapter 11 Who is Ellen B. ? Has...

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1 Chapter 11 Skeletal System Who is Ellen B. ? Has scoliosis ? Side-ways curvature of the spine. Surgery!
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2 Outline Overview of the Skeletal System Bone Growth, Remodeling, and Repair Bone Classification The Axial Skeleton The Appendicular Skeleton Articulations Movements Permitted by Synovial Joints Arthritic Joints
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3 Bones of the Skeleton Skeletal Functions . Permit flexible body movement - long bones. Support Body - against gravity. Protect soft body parts - brain, heart, lungs. Produce blood cells - flat bones. Store minerals and fat - calcium and phosphorus Provide sites for muscle attachment. . . . . . . . .
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4 Skeletal Functions - continued - REGULATE - one’s metabolism!!! - This means that it serves an endocrine function as well!!! - Osteoblasts produce a hormone ( osteocalcin ) which causes the pancreas (Islets of Langerhans) to make more insulin to regulate blood sugar and increase cell’s sensitivity to insulin. - Also causes fat cells to store less fat and secrete the hormone adiponectin which improves cells’ sensitivity to insulin. * Science News , Vol. 172, No. 6, August 11, 2007, p. 83 (originally published in Cell on August 10, 2007)
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5 Overview of the Skeletal System Bones are living tissue . Compact bone is highly organized and composed of tubular osteons . Osteo cytes (bone cells) lie in lacunae , tiny chambers arranged in concentric circles (lamellas) around a central canal. Matrix is collagen fibers, Ca/P mineral salts. Spongy bone contains numerous bars/plates (trabeculae) separated by unequal spaces. Spaces are often filled with red bone marrow , the source of all blood cells.
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7 Dia physis vs. Epi physis ? Epiphysial Plate ? (Growth Plate)
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11 Overview of the Skeletal System Cartilage Cartilage is flexible because the gel-like matrix contains collagenous and elastic fibers. Contains chondro cytes (cartilage cells) Three types differ according to type and arrangement of fibers. Hyaline - Firm and flexible (most abundant). . . . Where? Fibrocartilage - Strong. . . . Where? Elastic - Flexible. . . . Where?
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Overview of the Skeletal System Fibrous Connective Tissue Made of rows of fibroblasts (the cells) separated by bundles of collagenous fibers.
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This note was uploaded on 01/17/2012 for the course BIOL 103 taught by Professor Robertwest during the Spring '12 term at Lee.

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chapt11LectureOutlines - Chapter 11 Who is Ellen B. ? Has...

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