WVC BIO 47 - Tissues (66 pages)

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Tissues



Previewing pages 1, 2, 3, 4, 31, 32, 33, 34, 35, 63, 64, 65, 66 of actual document.

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Tissues

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Pages:
66
School:
West Valley College
Course:
Bio 47 - Human Anatomy

Unformatted text preview:

Tissues Chapter 3 Connective Tissue Function Support for entire body Transports fluid and dissolved material Protects and provides structure for viscera Protects and provides structure for surrounding tissues Nutrient and mineral storage Defends body from pathogens Connective Tissue Characteristics Most abundant widespread tissue type Never exposed to body surface Comprised of 3 components Specialized cells Extracellular Protein fibers Contributes to matrix Ground substance Contributes to matrix Connective Tissue Characteristics No cellularity extracellular matrix No polarity Innervated vascular Physical functional support Variable matrix consistency amongst tissue types Fluid Semi fluid semi solid solid Connective Tissue Types Lacks Exposure NO Polarity Components Specialized cells Vary by tissue type ex Fibroblast chondrocyte Matrix Extracellular protein fibers Ground substance fluid Specialized Cell Types Fibroblasts Macrophages Lymphocytes Mesenchymal Adipocyte Melanocyte Fibroblasts Most abundant cell Secretes Protein fibers Proteoglycans Matrix Hyaluronan Function Maintains matrix Macrophages Immune cell Function to engulf damaged cells pathogens Signal immune system Lymphocytes Immune cell Wandering cells Functions in immune responses Mesenchymal Connective tissue stem cells Pluripotent undetermined Differentiates into other cell types Adult Stem cell Function Replacement repair in adult tissues Embryonic development Adipocyte Adipocyte Stores lipid reserves Function support protection energy reserves insulation Melanocyte Synthesize secrete brown pigment Melanin Function protection from UV coloration Matrix Ground substance Vary in viscosity Fluid to solid Contains Hyaluronan viscosity Proteoglycans consistency Glycoproteins consistency Protein fibers Collagen Reticular Elastic Collagen fibers Colla glue Most common matrix fiber type Long straight unbranched thick chains Strongest High tensile strength Resistant to pulling Flexible 25 of the body s protein



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