CA1 LP 1&2: Intro and Epithelial Tissue

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Author:
ellen28
ID:
93912
Filename:
CA1 LP 1&2: Intro and Epithelial Tissue
Updated:
2011-07-13 15:03:12
Tags:
Clinical anatomy Soma Epithelial Tissue
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Clinical Anatomy LP 1&2: Intro and Epithelial Tissue
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  1. What are tissues?
    Group of cells that perform same geeral function
  2. What are the four types of tissues?
    • 1. Epithelial
    • 2. Connective
    • 3. Muscle
    • 4. Nervous
  3. What is the function of Ep tissue? (4)
    • - protection
    • - secretion
    • - absorption
    • - excretion
  4. Where is Ep Tissue located? (3)
    • - covers body surface
    • - covers/lines internal surfaces
    • - composes glands
  5. Characteristics of Ep Tissue: (5)
    • - continuous cellular sheet
    • - lacks blood vessels
    • - has basement membrane
    • - readily divides
    • - tightly packed
  6. Cancer cells: (2)
    • - spread by secreting substance into basement membranes
    • - allows to spread to adjacent cells
  7. Types Ep Tissue
    Identified by number of cell layers: (3)
    • 1. Simple > 1 layer (substances easily pass through)
    • 2. Stratified > multi-layered (thick!)
    • 3. Psuedostratified > 1 layer but looks like multiple (touches basement; ofte have cilia and goblet cells)
  8. Types Ep Tissue
    Identified by shape: (3)
    • 1. Squamos > flat cells
    • 2. Columnar > tall, cylindrical cells
    • 3. Cuboidal > cube shaped
  9. Characteristics of Simple Squamos cells: (5)
    • 1. Single layer of flat cells
    • 2. Substances pass easily
    • 3. Form air sacs of lungs (alveoli)
    • 4. Form capillaries (exchange substances)
    • 5. Form membranes that line body
  10. Characteristics of Simple Cuboidal cells: (4)
    • 1. Single layer of cube cells; square marshmallow
    • 2. Cover ovaries
    • 3. Line kidney tubes
    • 4. Line ducts of glands
  11. Characteristics of Simple Columnar cells: (3 types)
    - single layer of columnar cells

    • A. Ciliated > tiny hair like structures
    • 1. Line Reproductive tubes
    • B. Non-ciliated > lack cilia
    • 1. Line digestive tract: stomach, small intestine, large intestine
    • C. Specialized cells may have Microvilli
    • 1. Small, finger like extension to increase surface area for absorption
  12. Characteristics of Psueadostratified Columnar cells: (3)
    • 1. Single layer of columnar cells that appear stratified
    • 2. Lines passage way of respiratory sys
    • 3. Secrete mucous to trap dust (goblet cells)
  13. Characteristics of Stratified Squamos cells: (9)
    • 1. Many layers of flat cells
    • 2. Deep layers are cube or columnar shaped
    • 3. Superficial layers are squamos cells
    • 4. Cells replicate at basement membrane
    • 5. Older cells are pushed away from basement membrane
    • 6. Older cells accumulate protein (keratin) > Cells harden and die
    • ***7. Compose the outermost layer of skin (epidermis)
    • 8. Lines oral cavity
    • 9. Lines anal cavity
  14. Characteristics of Stratified Cuboidal cells: (2)
    • 1. Two or three layers of cube cells
    • 2. Lines larger ducts and tubules (usually secretes)
    • > Mammary glands
    • > Sweat glands
    • > Salivary glands
  15. Characteristics of Stratified Columnar cells: (3)
    • 1. Several layers of columnar cells
    • 2. Lines the pharynx
    • 3. Lines vas deferens
  16. Characteristics of Transitional Epithelium cells: (2)
    • 1. Specialized ep > changes shape in response to tension
    • 2. Lines urinary bladder
  17. Characteristics of Glandular Epithelial cells: (3)
    • 1. Specialized ep > produce/secrete substances
    • 2. Form Exocrine glands > secrete into ducts (tubes destined for outside)
    • * Stomach = OUTSIDE you body
    • 3. Form Endocrine glands > secrete into tissue or blood

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