Anatomy of a Bone
The title says it all. This is the classification of the different parts of a bone.
Terms
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- Nutrient Artery
- This enters the medullary cavity and branches throughout, supplying the shaft
- Periosteum
- A fibrous, cellular, vascular, and highly sensitive life support sheath for bone, providing nutrient blood for bone cells & a source of bone-developing cells during growth & after fracture; doesn't cover articular cartilage
- Yellow Marrow
- After childhood, blood cell production largely ceases in the marrow of the shaft; such cells are replaced by fat, which is yellow in color
- Medullary Cavity
- Serves to lighten bone weight and provide space for its marrow
- Articular Cartilage
- The only remaining evidence of an adult bone's cartilaginous past; is smooth, slippery, and bloodless
- Diaphysis
- The shaft of a large bone; consists of compact bone with a central cavity
- Cancellous (Spongy) Bone
- Tiny beams of bone forming a latticed truss capable of reorientation; resists the stresses of weight and postural changes as well as muscular development
- Red Marrow
- Packs the spaces between beams of certain bony epiphyses & elsewhere; consists of masses of developing & mature red/white blood cells supported by an array of loose, fine fibers
- Epiphysis (Epiphyseal Line)
- The end of a long bone; largely cancellous & capped with articular cartilage
- Compact Bone
- The dense bone of diaphysis; consists of repeating patterns of solid bone tissue organized into conentric layers; porous