Cartilage and Bone
Last Modified: 2011-07-05
- Hyaline - no visible fibers, most common, prototype
- Elastic - elastic fibers
- Fibrocartilage - dense collagen fibers
- Respiratory System: ying yong, trachea, bronchi, larynx, ribs (ventral), articualr long bones, fetal skeleton
- Appositional growth
- Interstitial growth
- What mechanism of chondrocyte growth?
- Growth within the matrix
- mitosis of young chondrocytes - not in adults
- expand via new matrix
- cells divide in matrix
- chondrogenic layer of perichondrium
- Cells divide and create new matrix - added to surface
- heal by scarring - fibroblast (liited by avascularity
- Which cartilage is located here?
- Ear pinna, auditory tube, epiglottis, larynx
- Location of this cartilage:
- vertebral discs, pubic symphysis, tendon/ligament insertions
- Modeling - adaptation to loading by changing size or shape
- Remodeling - 100 day cycle
- Osteoclasts break down bone
- Osteoblasts reform bone
- Plasticity - change in remodeling in response to stess
- Regeneration - can repair self
- Adapts structure to loading
- changes size and shape - removes damage, maintains strength
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