Parts of Long Bone

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created 5 years ago by clyde0208
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Terminology and Definitions
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1

Diaphysis

the shaft

2

Medullary Canal

aka medullary cavity; the hollow middle part of the bone lined by endosteum. A storage region for adipose, or yellow marrow. In the infant, this area is involved in forming blood cells, and so red marrow is found in the marrow cavities.

3

Epiphyseal Plate

a thin area of hyaline cartilage that provides for longitudinal growth of the bone during youth.

4

Proximal Epiphysis

the end of the long bone closer to the axis of the body; tends to be larger/wider.

5

Distal Epiphysis

the end of the long bone further away from the axis of the body; tends to be smaller.

6

Articular Cartilage

covers the epiphysis in place of the periosteum. The glassy hyaline cartilage provides a smooth surface to minimize friction at joints.

7

Yellow Marrow

aka adipose; stored in the medullary cavity

8

Red Marrow

confined to the interior of the epiphysis, where it occupies the spaces between the trabeculae of spongy bone in adults.