Lec07 - ABOUT CONNECTIVE TISSUE 2 Histology TERMS...

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ABOUT CONNECTIVE TISSUE ……….
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2 Histology TERMS: PARENCHYMA: Epithelial Components of an Organ ( consists of that tissue which conducts the specific function of the organ and which usually comprises the bulk of the organ) STROMA : Supporting Framework of Connective Tissue ……Everything else….This Supports and Cushions the parenchyma.
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Parenchyma / Stroma: The parenchyma of an organ consists of that tissue which conducts the specific function of the organ and which usually comprises the bulk of the organ. Stroma is everything else --
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Parenchyma/Stroma T he parenchyma of the kidney is epithelial tissue (renal tubules and corpuscles). The blood vessels, nerves, and supporting connective tissue of the kidney comprise the stroma . The parenchyma of the spleen is connective tissue (mostly lymphocytes and other blood cells). The supporting fibrous connective tissue of the spleen comprises the stroma . The parenchyma of the heart is muscle tissue (cardiac muscle cells). The nerves, intrinsic blood vessels, and connective tissue of the heart comprise the stroma . The parenchyma of the brain is nervous tissue (nerve cells and glia). The blood vessels within the brain and the connective tissue asso ciated with these blood vessels are stroma .
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Connective Tissue Widely spaced cells separated by fibers and ground substance ( Matrix ) Most abundant and variable tissue type
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What is MATRIX?
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Maintaining the Integrity is as GLUE IS IMPORTANT IN THIS MANNER… And So THE MATRIX is Very IMPORTANT in CONNECTIVE TISSUE MATRIX IS LIKE …. .GLUE….
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Types of Matrix: 1. viscous semifluid gel - glycoprotein 2. calcium salts 3. water soluble protein plasma 4. fibrous proteins
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Connective Tissue Matrix Matrix = Fibers + ground substance 3 Types of fibers occur in connective tissue: collagen, reticular and elastic Fibroblasts form all 3 of these by secreting protein subunits Ground Substance = clear, colorless, viscous fluid that fills the spaces between fibers. Its density slows the spread of pathogens. Composed of glycoproteins and proteoglycans.
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Connective Tissue Ground Substance Gelatinous material between cells absorbs compressive forces Consists of 3 classes of large molecules glycosaminoglycans – chondroitin sulfate disaccharides that attract sodium and hold water role in regulating water and electrolyte balance Proteoglycan (bottlebrush-shaped molecule) create bonds with cells or extracellular macromolecules adhesive glycoproteins protein-carbohydrate complexes bind cell membrane to collagen outside the cells
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Glycosaminoglycans (GAGs) These are important components of connective tissues. Long unbranched
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This note was uploaded on 12/08/2011 for the course AMY 2A taught by Professor Jamesivey during the Spring '06 term at Riverside Community College.

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Lec07 - ABOUT CONNECTIVE TISSUE 2 Histology TERMS...

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