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7 Cards in this Set
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Bone Formation |
Known as “Ossification” Occurs in 4 situations: 1. The initial formation of an embryo 2. The growth of bones during infancy until adult size is reached 3. The remodeling of bone 4. Repair of fractures |
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Bone Fractures |
A fracture is any break in a bone Types of fractures include: Partial Complete Closed (simple) Open (compound) |
Definition and Types |
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Partial Fracture |
An incomplete break across the bone, such as a crack |
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Complete Fracture |
A complete break across the bone. The bone is broken into two or more pieces |
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Closed (simple) |
The fractured bone does not break through the skin |
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Open (compound) |
The broken ends of the bone protrude through the skin |
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Repair of Fractures |
Repair of a fracture involves several steps: 1. First, phagocytes remove any dead bone tissue 2. Then, chondroblasts form fibrocartilage at the fracture site that bridges then broken ends of the bone 3. Next, the fibrocartilage is converted to spongy bone tissue by osteoblasts 4. Finally, bone remodeling occurs, in which dead portions of bone are absorbed by osteoclasts and spongy bone is converted to compact bone |
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