Flat bones Flat bones form the roof of the skull the scapulae shoulder blades

Flat bones flat bones form the roof of the skull the

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Flat bones –Flat bones form the roof of the skull, the scapulae (shoulder blades), the sternum, and the ribs. Irregular bones – Include the vertebrae; ossa coxae (hip bones); and several bones in the skull, such as the ethmoid, sphenoid, and sutural bones.
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8. Given a diagram of a longitudinal section of a long bone, identify the following structures: a. Diaphysis b. Epiphysis c. Metaphysis, d. Epiphyseal line, e. Epiphyseal plate, f. Articular cartilage, g. Compact bone, h. Spongy bone, i. Periosteum, j. Endosteum, k. Medullary cavity. 9. Describe blood supply and innervation (nerve supply) of the bone. 10. Describe the function of the following structures: a. Epiphyseal plate – A thin layer of hyaline cartilage that provides for the continued lengthwise growth of the bone. b. Epiphyseal line – The remnant of the epiphyseal plate in adults is a thin, defined area of compact bone called the epiphyseal line. c. Periosteum – A tough sheath that covers the outer surface of the bone except for the areas covered by articular cartilage. The periosteum consists of two layers. The outer fibrous layer of dense irregular connective tissue protects the bone from surrounding structures, anchors blood vessels and nerves to the surface of the bone, and serves as an attachment site for ligaments and tendons. The inner cellular layer includes osteo-progenitor cells, osteoblasts, and osteoclasts. d. Endosteum – Is an incomplete layer of cells that covers all internal surfaces of the bone within the medullary cavity. e. Medullary cavity – The hollow, cylindrical space within the diaphysis. In children, this cavity contains red bone marrow, which later is replaced by yellow bone marrow in adults.
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