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Unformatted text preview: bone o Sharpey's fibers: collagen fibers extending from fibrous layer into bone matrix; secure periosteum to underlying bone o Endosteum: covers trabeculae of spongy bone & canals of compact bone; contains osteoblasts & osteoclasts Gross anatomy of short, irregular & flat bones:- periosteum-covered outer compact bone & endosteum-covered inner spongy bone- no shaft or epiphyses- bone marrow present between trabeculae; no marrow cavity- diploe: folded spongy bone in flat bones Hematopoietic tissue in bones:- Hematopoiesis occurs in red marrow (in cavities of spongy bone of long bones & diploe of flat bones)- In infants, medullary cavity & all spongy bone have red bone marrow- In adults, red bone marrow in the head of the femur & humerus, & diploe of flat bones & some irregular bones (hip bone)- During anemia (blood cell deficiency), yellow marrow can revert to red marrow Microscopic structure of bone: Compact bone (lamellar bone): units called osteons or Haversian systems...
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- Fall '10
- Anthropology, Bone marrow