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131%2C+T8%2C+Ch6+Bone+Tissues

131%2C+T8%2C+Ch6+Bone+Tissues - Bone Tissue Chapter 6 IB...

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9/11/11 1 Bone Tissue Chapter 6 IB 131 Instructor: Tom Carlson Dept of Integrative Biology University of California, Berkeley 1 Cartilage Resilient tissue—springs back to original shape Poorly vascularized Location and basic structure –Found throughout adult body Hyaline cartilage: Articular cartilages and costal cartilage, larynx, trachea, and nose Elastic cartilage: Ear pinna & epiglottis Fibrocartilage: Intervertebral discs, knee menisci, and pubic symphysis 2 Types of Cartilage Hyaline cartilage Elastic cartilage • Fibrocartilage 3 Hyaline cartilages Elastic cartilages Fibrocartilages Cartilages Cartilage in external ear Cartilages in nose Articular cartilage of a joint Costal cartilage Cartilage in intervertebral disc Pubic symphysis Articular cartilage of a joint Meniscus (padlike cartilage in knee joint) Cartilage Epiglottis Larynx Trachea Cricoid cartilage Lung Respiratory tube cartilages in neck and thorax Thyroid cartilage 4 Hyaline Cartilage Rich in collagen fibers with glassy appearance Most abundant cartilage Provides support through flexibility and resisting compression Articular cartilage at ends of adjoining bones of movable joints Attachments of ribs to sternum • Nose Respiratory tubular structures in neck and thorax including larynx, trachea, bronchi Forms embryonic skeleton 5 Elastic Cartilage Contains many elastic fibers in addition to collagen fibers Able to tolerate repeated bending Present in outer ear and epiglottis 6
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9/11/11 2 Hyaline cartilages Elastic cartilages Fibrocartilages Cartilages Cartilage in external ear Cartilages in nose Articular cartilage of a joint Costal cartilage Cartilage in intervertebral disc Pubic symphysis Articular cartilage of a joint Meniscus (padlike cartilage in knee joint) Cartilage Epiglottis Larynx Trachea Cricoid cartilage Lung Respiratory tube cartilages in neck and thorax Thyroid cartilage 7 Fibrocartilage An intermediate between hyaline and elastic cartilage Resists strong compression (pushing pressures) and strong tension (pulling pressures) Pubic symphysis Some ligaments Articular discs of some joints e.g., menisci in knees Annulus fibrosis portion of the discs in between vertebrae 8 Gelatinous ground substance Chondrocyte in a lacuna Elastic fibers Lacuna Matrix Chondrocyte in a lacuna Perichondrium Chondrocyte in a lacuna Collagen fibers (a) Hyaline cartilage (180 × ) (b) Elastic cartilage (470 × ) (c) Fibrocartilage (285 × ) Cartilages in the Adult Body Figure 6.2 9 Perichondrium Membrane of fibrous connective tissue that surrounds the external surface of cartilage 10 Growth of Cartilage Appositional growth – Chondroblasts in surrounding perichondrium produce new cartilage Interstitial growth Chondrocytes within cartilage divide and secrete new matrix Cartilage stops growing when the skeleton stops growing 11 Different Tissues in Bone Dominated by bone connective tissue • Contain nervous tissue and
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