Epithelial Tissue

Cards (55)

    • elongated cell with extremely fine processes
    • very small amount
    • for transmission of nerve impulses
    Nervous tissue
    • Aggregated polyhedral cells
    • small amount
    • lining of surface of body cavities
    Epithelial Tissue
    • elongated contractile cells
    • moderate amount
    • strong contraction; body movements
    Muscle Tissue
    • several type of fixed and wandering cells
    • abundant amount
    • support and protection of tissue and organs
    Connective Tissue
  • epithelial tissue In which cells are bound tightly together structurally and functionally to form a ?
    sheetlike or tubular structure
  • epithelial tissue is composed of polyedral cell and thin layer of extracellular material
  • The cell's size and morphology are generally dictated by their ?
    function
  • region of the cell that faces the connective tissue or basal membrane
    basal surface/pole
  • usually faces the surface of lumen
    apical surface/pole
  • all epithelial tissue lie at the
    basement membrane
  • all epithelial tissue are
    avascular
  • Basement membrane act as filter and provide support for epithelial tissue
  • basement membrane is the structure near the epithelial cells
  • thin mesh work type IV collagen and laminin produced by the epithelial cells
    basal lamina
  • contain type III collagen and anchoring fibrillation of VII collagen
    reticular lamina
  • epithelial cells are connected to the lateral sides and the basement membrane by these junctional complexes
  • seals adjacent cells to one another, controlling passage of molecule between them and separates apical and basolateral membrane domains
    occluding or tight junctions
  • provide points linking the cytoskeleton of adjacent cells; strengthen and stabilizes nearby ocular junction.
    site of strong cell adhesion
    adherent junction
  • provides point of strong intermediate filament coupling between adjacent cells, strengthening the tissue
    resembles a belt around the cell
    desmosome or macula adherens
  • anchoris cytoskeleton to the basal lamina
    hemidesmosome
  • allows direct transfer of small molecules and ions from one cell to another.
    this is more on the intracellular communication instead of cell to cell adhesion
    gap or communicating junction
  • small membrane projections with cores of actin filaments that generally function to increase epithelial cells apical surface area for absorption
    microvili
  • long microvili with specialized mechanosensory function; loger and less mobile than microvili and show branching distally
    stereocilia
  • larger projecting structures with a well organized core of microtubule in which restricted, dyein based sliding of microtubule causes ciliary movement that propel material along an epithelial surface

    cilia
  • motile cilia exhibit rapid beating pattern that move certain substances into our tissue
  • the one responsible for the pattern or movement is axoneme
  • axoneme is 9+2 assembly of microtubule = 11
  • flat; sheet like thin appearance cell
    squamous
  • square/cuboid, equal width, height and depth
    cuboidal
  • tall/rectangular, taller than they're wide
    columnar
    • one layer
    • pseudostratified epithelial
    • made up of packed cells that appeared to be arranged in many layers because of different sizes and the orientation of their nucleus
    simple epithelium
    • two or more layers
    • transitional epithelim/urothelium
    • cell constituting the tissue can change the shape depending on the dissension in the organ
    stratified epithelium
  • for movement of substances
    ciliated
  • serious lining of cavities such as pericardium, pleura, peritoneum for lubrication
    meso for the term middle
    mesothelium
  • made up of flat cells that lines the blood vessels
    endo means within
    endothelium
  • basket cells, to remodel the scars in the skin
    myoepithelium
  • lining of uterus
    endometrium
  • layer of the ovaries and seminiferous tubules
    germinal epithelium
  • for secretions and also known as secretory epithelium
    glandular epithelium
  • lining of loop of Henle, Alveoli, Blood vessels
    simple squamous