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Long Bone Anatomy
Terms & functions of a long bone
9
Anatomy
12th Grade
11/09/2020

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Term
MEDULLARY CAVITY  
Definition
Area of the diaphysis that serves to lighten bone weight and provide space for yellow marrow. This section is associated with fat.
Term
COMPACT BONE
Definition

 

A dense bone found in the diaphysis. Its repeated pattern is arranged in concentric layers of solid bone tissue. The compact bone can be seen as the layer just underneath the periosteum, color both ends.

Term
EPIPHYSEAL LINE
Definition
Disk, also called the growth plate, is found on both ends of the long bone. Color both ends.
Term
CANCELLOUS (spongy) BONE and MARROW
Definition
Found mainly within the epiphysis and has a textured appearance where it contains red marrow.
Term
ARTICULAR CARTILAGE
Definition

Found on the ends of long bones. It is smooth, slippery, and bloodless.

It provides a smooth, lubricated surface for low friction.

 

Term
DIAPHYSIS
Definition
Shaft of the long bone. It has compact bone with a central cavity.
Term
EPIPHYSIS
Definition
Thin layer of compact bone, while internally the bone is cancellous. It is capped with articular cartilage. Bone growth takes place here.
Term
 ENDOSTEUM
Definition
Tissue that  lines the medullary cavity of the bone. It stimulates bone resorption along with the periosteum.
Term
 PERIOSTEUM
Definition
A vascular, sensitive life support covering for bone. It provides nutrient-rich blood for bone cells and is a source of bone-developing cells during growth or after a fracture. It is the outermost layer.
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