Epithelial Tissue

• • 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