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2011-09-19 19:48:03
Tissue Lev1

Tissue Lev1
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  1. Which level?
    Group of similar cells
    Common embryonic origin
    Common function
    Tissue Level
  2. Covers body surfaces
    Lines hollow organs, cavities and ducts
    Forms glands
    Epithelial Tissue
  3. Material found between cells and organs
    Supports and binds structures together
    Stores energy as fat
    Provides immunity to disease
    Connective Tissue
  4. Provides movement and generation of force
    Muscle Tissue
  5. Cells that generate and conduct nerve impulses
    Control and coordinate body functions
    Nerve Tissue
  6. What are the 3 germ layers within the embryo?
    • endoderm
    • mesoderm
    • ectoderm
  7. Epithelium from all 3 germ layers
    Connective tissue & muslce from mesoderm
    Nerve Tissue from ectoderm
    Tissue derivations
  8. How many distinct layers do cells of embryonic disc produce?
  9. Forms epithelial lining of FI & respiratory
  10. Forms muscle, bone & other connective tissues
  11. Develops into epidermis of skin and nervous system
  12. Which type of Epithelium...
    Epidermis of skin
    Lining of blood vessels and ducts
    Lining respiratory, reproductive, urinary and GI tract
    Covering and lining epithelium
  13. Which type of Epithelium...
    Secreting portion of glands
    ex. thyroid, adrenal, and sweat glands
    Glandular epithelium
  14. What are the 8 general features of epithelial tissue?
    • 1. Closely packed cells forming continuous sheets
    • 2. Cells held together with tight junctions and little extracellular material between them
    • 3. Cells sit on basement membrane
    • 4. Apical (upper) free surface
    • 5. Avascular -- without blood vessels (nutrients diffuse in from underlying connective tissue
    • 6. Good nerve supply
    • 7. Rapid cell division
    • 8. Numerous functions including protection, absorption, secretion, etc.

    (STBAANRF) so the banker and andy never ran faster
  15. Which Basement Membrane:
    From epithelial cells
    Collagen fibers
    Basal lamina
  16. Which Basement Membrane:
    Secreted by connective tissue cells
    Reticular fibers
    Reticular lamina
  17. Holds cells to connective ttissue
    note: nerve supply BUT avascular
    Basement Membrane
  18. one cell layer thick
  19. many cell layers thick
  20. single layer of cells where all cells don't reach apical surface
    (nuclei are found at different levels so it looks multilayered)
  21. shape of surface cell: flat
  22. shape of surface cell: cube-shaped
  23. shape of cell surface: tall column
  24. shape of cell surface: shape varies with tissue stretching
  25. Lines blood vessels (endothelium), and body cavities (mesothelium)
    Very thing -- controls diffusion, osmosis and filtration
    Simple Squamous Epithelium (Single layer of flat cells)
  26. Cells in direct contact with each other
    Simple squamous epithelium
  27. Lines tubes of kidney
    Absorption or secretion
    Single layer of cube-shaped cells viewed from the side
    Simple Cuboidal Epithelium
  28. Single layer rectangular cells
    Unicellular glands
    Nonciliated Simple Columnar
  29. Goblet cells secrete mucus
    (lubricate GI, respiratory, reproductive and urinary systems)
    Important unicellular glands
  30. Fingerlike cytoplasmic projections
    For absorption of GI tract (stomach to anus)
  31. Single layer rectangular cells with cilia
    Much from goblet cells moved along by cilia (found in repiratory system and uterine tubes)
    Ciliated Simple Columnar Epithelium
  32. Single cell layer
    All cells attach to basement membrane but not all reach free surface
    Nuclei at varying depths
    Respiratory system, male urethra & epididymis
    Pseudostratified Columnar
  33. Several cell layers thick
    Surface cells flat
    Stratified Squamous Epithelium
  34. Surface cells dead and filled with keratin
    -skin (epidermis)
  35. No keratin in moist living cells at surface
    -mouth, vagina
  36. Multilayered
    Surface cells cuboidal
    -rare (only found in sweat gland ducts and male urethra)
    Stratified Cuboidal Epithelium
  37. Multilayered
    Surface cells columnar
    Rare (very large ducts & part of male urethra)
    Stratified Columnar Epithelium
  38. Multilayered
    Surface cells varying in shape from round to flate if stretched
    Lines hollow organs that expand from within (urinary bladder)
    Transitional Epithelium
  39. Derived from epithelial cells that sank below the surface during development
    Glandular Epithelium
  40. Glandular Epithelium:
    Cells that secrete onto free surface of epithelial layer or into ducts
    Unicellular glands or multicellular glands
    Exocrine glands
  41. Glandular Epithelium:
    Secrete hormones into the bloodstream (ductless)
    Hormones help maintain homeostasis
    Endocrine glands
  42. Exocrine Glands:
    Unicellular are single-celled glands called ______
    goblet cells
  43. Exocrine glands:
    Classified according to shape of duct: simple (unbranched) or compound (branched) ducts
    Classified according to structure of gland: tubular or acinar (flask-liek)shape or both
    Multicellular glands
  44. unbranched ducts
    simple ducts
  45. branched ducts
    compound ducts
  46. flask-like shape
  47. Methods of Glandular Secretion:
    Most glands
    Cells release their products by exocytosis
    Eg saliva, digestive enzymes & sweat
  48. found only in mammary gland
    Upper part of cell pinches off and dies
  49. Oil gland (sebaceous)
    Whole cells die & rupture to release their products