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bones
bones
19
Anatomy
Undergraduate 2
11/06/2008

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Term
5 main purposes of bones
Definition
1. support 2. protect 3. mineral storage 4. lipid storage 5. blood cell production
Term
Types of bone marrow
Definition
Yellow bone marrow: In long bones fatty
Red Bone Marrow: for blood cell formation
Term
Types of bone
Definition
1. Long 2. short 3. sesimoid 4. irreagular 4.sutural
Term
What is bone made up from?
Definition
Mostly hydroxyapatite. Lots of calcium and lots of phosphate
Term
Osteocyte
Definition
Mature bone cell
Maintain protein and mineral content
Located in the lacunae
participate in the repain of bone
Term
Osteoprogenitor
Definition
Stem cell divison: Differentiate into osteoblast
Term
Osteoclast
Definition
rempve and recycle bone matrix: giant cells 50 + nuclei
Term
Osteoblast
Definition
New bone matrix: Osteogenesis build
Term
How do bones heal?
Definition
1. Hematoma develops: Blood clot
2. Callus formation:internal calus unites the inner edges and external callus stabilizes the outer edge
3.Chondrocyte activities: external callus has been replaced by bone. Dead bone near the break is removed and replaced.
4. Osteoblast activity: Osteoclast and osteoblast remodel the region. little or no evidence once healed
Term
Ossification
Definition
1.Catilage enlarges, chondrocytes enlarge and die. Leaving cavities in cartilage
2. Blood vessels grow on the edges of cartilage. cells convert to osteoblast. shaft becomes enshealthed in a superficial layer of bone.
3.Blood vessels invade the central region.Osteoclast begine producing spongey bone. Bone formation spreads on the shaft
4. Remodeling occurs.shaft becomes thicker. Cartiledge near epiphysis is replaced by bone
5.cappilaries and osteoblast migrate into the epiphysis create secondary ossification centers
6. Epiphysis filled with spongey bone. Articular cartiledge remain. Metaphysis and epiphysis from the diaphysis.
Term
Potts
Definition
Ankle. Both bones in the leg
Term
colles
Definition
distal radius- cushions the fall
Term
commuted
Definition
shatter
Term
transverse
Definition
bend- across the long acess
Term
spiral
Definition
twisting stresses : abuse
Term
displaced
Definition
knocked out of place
Term
green stick
Definition
young children: one side of the shaft
Term
epiphyseal
Definition
at the growth plate: young kids: can stop growth
Term
compression
Definition
car accident
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