-
5 Function of the bone
- 1. Support/Shape
- 2. Storage
- 3. Blood Cell Production
- 4. Protection
- 5. Leverage for Muscle
-
4 Bone Types
- 1. Long Bone
- 2. Short Bone
- 3. Fat Bone
- 4. Irregular
-
2 Structure of Long Bone
- 1. Compact Bone
- 2. Spongy Bone
-
Example of long bone
Femur, humerus, etc
-
Ex. of short bone
Carpals, Tarsals
-
Ex. of Fat Bone
Ribs, Sterum, Parieta
-
Ex. of Irregular
Coxae, Vertebrae, Scapula
-
- Strongest type of bone found in the diaphysis of long bones
- It is made up of OSTEONS!
Compact Bone
-
- Weaker type of bone
- Found in the epiphysis of long bones
- RBM running through it.
- Made up of bony plates called TRABECULAR.
- NO OSTEONS!
Spongy Bone
-
- 1. Spongy Bone
- 2. Compact Bone
- 3. Medullary Cavity
- 4. Epiphysis
- 5. Diaphysis
- 6. Epiphysis
-
- 1. Articular Cartillage
- 2. RBM
- 3. FAT (Yellow Marrow)
- 4. Periosteum
- 5. Endosteum
-
Remodeling of Bones
Osteocytes
-
2 Type of osteocytes
- 1. Osteoblasts
- 2. Osteoclasts
-
* Cells that build bones
- increase # in children/ babies
- Calcitonin
* decrease blood calsium level
OsteoBlasts
-
* Cells that break down bone
- increase # in elderly/aging pop.
- Calcitrol
* increase Blood calsium levels
OsteoClasts
-
-Hormon that when expressed,
-Stimulates osteoBlasts to build bone.
CalCitonin
-
- Stimulates osteoClasts to break down bone,
b/c the body is needing more blood calcium
CalCitrol
-
Basic functional unit of compact bone
Osteon
-
- 1. Osteon (Haversion System)
- 2. Haversion Canal (Lartery Vein)
- 3. Osteocytes
- 4. Caniliculi
- 5. Lacunae
-
Cytoplasm processes of osteocytes seat onto from their lacunae to communicate w/ adjacent lacunae
Caniliculi
-
Connect adjacent Haversion Canals
Volksman Canal (Performating Canal)
-
The replacing of a cartilage model by bone in a fetus
Endochondral Ossification
-
Endo - 1
Chondr - 2
Al - plural
Ossi - 3
Fication - 4
- 1. Inside
- 2. Cartilage
- 3. Bone
- 4. Formation of
-
-
Primary ossification center
Diaphysis
-
2nd ossification center
Diaphysis
-
Process by which FLAT BONES are made from a cartilage model.
Intramembranous Ossification
-
Requirement to normal Bone Growth
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