Ch 4

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  1. Name the Four Tissue Types
    *Epithelial Tissue[ep-uh-thee-lee-uhm]

    *Connective Tissue

    *Muscle Tissue

    • *Nervous Tissue
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  2. Extracellular Matrix
    • *substance produced by cells of a specific tissue
    • (Protein fibers, salts, h2o and dissolved macromolecules)

    *located outside of cells
  3. Epithelial Cell Layers[ep-uh-thee-lee-uh]

    Simple/Stratified/Pseudostratified(pseu·do·strat·i·fi·ca·tion)  Epithelium
    Simple Epithelium-single layer of cells,apical surface, attached to basement membrane

    Stratified Epithelium-2 or more layers of cells, not all cells have an apical surface or basement membrane

    • Psuedostratified Epithelium-single layer but not all cells reach their nuclei give the appearance of multilayered&stratified...but they aren't
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  4. Epithelial Cell Shapes

    Squamous/Cuboidal[kyoo-boid]/Columnar[kuh-luhm-ner]
    *Squamous-flattened,fried egg

    *Cuboidal-nucleus centrally located

    • *Columnar-taller than wide, nucleus is oval & located in the basal region of the cell 
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  5. *Glands
    *Endocrine
    *Exocrine 
    *mucin, hormones, enzymes, waste products

    *endocrine- glands DO NOT possess ducts and secrete directly into the bloodstream,

    • *exocrine-glands Do possess ducts and their cells secrete to products to their ducts; almost all exocrine glands are derived from epithelial tissue
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  6. Connective Tissue
    Function & Examples
    *Most diverse, abundanct, widely distributed and structurally vaired of all four tissue types

    *Function is to "connect" one structure to another

    *CT is the "glue" and "filler" of the boddy

    *Tendons, ligaments, body fat, bones and cartilage
  7. Functions of Connective Tissue
    *Physical Protection

    *Support and structural framework

    *Storage

    *Transport

    *Immune Protection

    *Development of CT

    *Arises from mesoderm
  8. Two Types of Embryonic[em-bree-on-ik] CT
    *Mesenchyme{mes-eng-kahym}
    *Mucous[myoo-kuhs}
    *Mesenchyme-source of all adult CT

    *Mucous-found in umbilical cord& can contain stem cells for future use by the individual
  9. Connective Tissue can be classified into 3 broad categories....
    *CT proper

    *Supporting CT

    *Fluid CT
  10. Two groups of Cells in Connective Tissue Proper:
    Resident Cells & Wandering Cells
    *Ressident Cells: fibroblasts,adipocytes,fixed macrophages and mesenchymal cells

    *Wandering cells: mast and plasma cells, free macrophages and leukocytes
  11. Define Collagen Fibers
    • long, unbranching, strong, flexible and resistant to stretching.
    • 25% of all protein in the human body, making collagen the most abundant protein
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  12. Define Elastic Fibers
    thinner than collagen, stretch easily, branch and rejoin. Image Upload
  13. Define Reticular Fibers
    Thinner than collagen fibers, form a meshwork-like congiguration. They are found in organs with abundant spaces such as liver, lymph nodes and spleen

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Author:
21Carly
ID:
169211
Filename:
Ch 4
Updated:
2012-09-06 05:29:04
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Ch4
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Ch 4
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