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

131%2C+T8%2C+Ch6+Bone+Tissues - 9/11/11 Bone Tissue Chapter...

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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
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This note was uploaded on 10/14/2011 for the course IB 131 taught by Professor Carlotom during the Spring '11 term at City College of San Francisco.

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131%2C+T8%2C+Ch6+Bone+Tissues - 9/11/11 Bone Tissue Chapter...

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