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Anatomy test 2 Study notes

Anatomy test 2 Study notes - Chapter 7 Summary Functions of...

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Chapter 7 Summary Functions of the Skeleton: -Support -Protection -movement -electrolyte balance (stores calcium and phosphate and releases it according to bodies needs) -acid-base balance (by absorbing or releasing alkaline salts such as calcium phosphate) -blood formation ------------------------------------------------------------------------------------------------------------------------- Skeletal Cartilage *no blood vessels or nerves *high water content *Cartilage growth ends when skeletal growth stops. (Epithelial plate turns to epithelial line) (Chondroblast and Chondrocytes) 1. Hyaline Cartilage: -most common -nasal septum, tracheal ring, articular surfaces, ends of ribs -precursor to developing skeleton -main fiber is collagen -chondrocytes trapped in lacunae 2. Elastic Cartilage: -external ear and epiglottis -numerous bundles of branching fibers, also has collagen -interstitial and oppositional growth 3. Fibrocartilage -Intervertebral discs, menisci of joints -Thick layers of collagen fibers oriented in direction of functional stress -No perichondrium (so only interstitial growth) -Great tensile strength Appositional -Growth from outside; chondroblasts (make cartilage) in chondrogenic layer of perichondrium secret new matrix against existing cartilage
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