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12 Cards in this Set
- Front
- Back
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What are the predominant components of the ground substance of cartilage?
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-type I collagen (superficial)
-type II collagen (deep) -proteoglycans -water |
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What are the three types of cartilage?
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1. Hyaline
2. Fibrocartilage 3. Elastic |
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What are the origins and functions of chondroblasts?
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-originate from primitive mesenchymal cells
-function is to synthesize ground substance and fibrous extracellular matrix |
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What is the function of the perichondrium?
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-it is supportive tissue containing chondroblasts
-found at the periphery of mature cartilage |
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What major factor limits the thickness of hyaline cartilage?
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-the blood supply to the area
-avascularity in most cartilage tissue is cause for metabolites to be exchanged by diffusion through the water of solvation of the ground substance |
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What structures are composed of hyaline cartilage?
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-nasal septum
-larynx -tracheal rings -articular surfaces -precursor of bone -sternal ends of ribs |
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Why can't you see collagen fibers in hyaline cartilage using routine light microscopy?
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?
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Why are chondrocytes necessary for cartilage maintenance?
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-they have a prominent rough ER which is important for protein synthesis
-important since they synthesize the extracellular matrix (matrix turnover) |
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What structures are composed of fibrocartilage?
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-intervertebral discs
-some articular cartilages -pubic symphysis -ligaments -connections of some tendons to bone -associated with dense collagenous tissue in joint capsules |
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What accounts for the difference in physical properties between fibrocartilage and hyaline cartilage?
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-the arrangement of their matrix and collagen fibers
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What structures are composed of elastic cartilage?
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-external ear and auditory canal
-epiglottis -some laryngeal cartilage -walls of the Eustacian tubes |
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What accounts for the difference in physical properties between elastic and hyaline cartilage?
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-the elasticity is due to the presence of bundles of elastic fibers in the cartilage matrix
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