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Osseous Tissue and Bone Structure
Definitions of bone structures
15
Anatomy
Undergraduate 2
09/18/2012

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Term

Axial Skeleton:

 

Definition
Bones of the thorax,skull, and the vertebral column.
Term
Appendicular Skeleton:
Definition
Bones of limbs and girdles that attach to the axial skeleton.
Term
Osteoclasts:
Definition
Remove and remodel bone matrix.
Term
Osteoprogenitor Cells:
Definition
Mesenchymal cells that produce cells that differentiate into osteoblasts.
Term
Osteocytes:
Definition

Maintain protein and mineral content of adjacent matrix.

Cannot divide.

Term
Osteoblasts:
Definition

Prouce new bony matrix.

Become osteocytes once surrounded by bony matrix.

Term
Compact bone:
Definition
Organized concentric lamellae around a central canal.
Term
Appositional bone growth:
Definition
Increases bone diameter of existing bones.
Term
Circumferential lamellae:
Definition
Outer and inner surfaces of compact bone layer.
Term
Interstitial lamellae:
Definition
Fills spaces between osteons.
Term
 Spongy Bone:
Definition
Located where bones not heavily stresssed or in many direction.
Term
Perforating fibers:
Definition

Created by osteoblasts in periosteum cellular layer.

Connects tendons, ligaments, and joint capsules to bone through periosteum.

Term
Intramembranous ossification:
Definition
Begins as mesenchymal (stem) cells differentiate into osteoblasts within embryonic or fibrous connective tissue.
Term
Endosteum:
Definition
Covers spongy bone and lines central canals.
Term
Osteon:
Definition
Functional unit of bone.
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