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Function of Cartilage
Supports soft tissue, such as the C-shaped hyaline cartilage rings in the trachea
Growth Patterns of Cartilage
Cartilage grows in two ways:
Interstitial Growth and Appositional Growth
Interstitial Growth (stage 3)
Cells synthesize and secrete new cartilage matrix, they are pushed apart and now reside in their own lacunae
Interstitial Growth (stage4)
The new individual cells within their own lacunae are called chondrocytes. new matrix has been produced internally, and thrus interstitial growth has occurred.
Appositional Growth (second type of Cartilage Growth)
Growth that occurs later in life after full maturity due to injury or healing. This growth occurs only at the prriphery of the tissue.
Appositional Growth (stage 1)
Stem cells at the internal edge of the perchondrium begin to divide, forming new and committed cells
type of stem cell that can produce a subset of like cells (ex. hematapoetic cells - blood stem cells).
Appostional Growth (stage 3)
These chondroblasts, located at the periphery of the old cartilage, begin to produce and secrete new cartilage matrix, they are pushed apart and now reside in their own lacunae.
Appositional Growth (stage 4)
The new matrix has been produced peripherally, and thus appositional growth has occured.
How do the three cartilage types differ with respect to their locations and functions in the body?
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