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20 Cards in this Set
- Front
- Back
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Functions of Bones
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-Framework and Protection
-Levers and Anchors -Sites for Hemopoiesis -Sites for Calcium storage -Sites for Fat storage |
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Bone Cells
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-Osteoprogenitor cells - produce osteoblasts
-Osteoblasts - make bone -Osteocytes -Osteoclasts - dissolve bone,bone resorption, become more active to release calcium if calcium is low |
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Osteoclasts
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-dissolve bone
-bone resorption -Acid Phosphatase - dissolves calcium + phosphate into solution -Cathepsin K - digests the fibers, matrix, and cells -Howship's Lacuna |
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2 Bone Types
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-Compact Bone
-Cancellous Bone |
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What is Compact bone also called?
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Lamellar Bone, Cortical Bone
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What is Cancellous Bone also called?
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Spongy Bone, Trabecular Bone
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Compact Bone
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-formed around blood vessel
-densely packed -osteons -Haversion Canals -Volkmans Canals |
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Haversion Canals
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run parallel to the bone
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Volkmans Canals
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run perpendicular to the bone
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Lamella
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-rings of matrix
-individual ring is an osteon |
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Cancellous Bone
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-not organized
-just as hard as Compact Bone |
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Trabeculae
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-make bone look like coral
-contains hemopoietic tissue |
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Periosteum
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fibrous covering on the bone
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Fibrous Periosteum
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-Dense Irregular Connective Tissue
-layer you can see |
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Osteogenic Periosteum
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-lining of the Fibrous Periosteum
-actually touches bone -contains all the bone cells -multipotent stem cells |
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Bones that do not have periosteum
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-Talus
-Pisiform -Patella -where cartilage covers bone -neck of femur -ends of bones |
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Endosteum
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-internal lining of the bone
-all bones have it -contains all bone cells -multipotent stem cells |
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Fatty Transformation
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-how cancellous bone turns into compact bone tube
-red marrow -> yellow marrow |
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Red marrow
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hemopoietic tissue
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Yellow marrow
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fat tissue
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