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Digestive System I: Gastrointestinal Tract, 64522232 ปภัสรา รื่นรวย,…

- - - - Gum & hard palate
    - - Covers soft palate, lips, cheeks &
        floor of mouth
  - - - stratified squamous epith. with skin
        appendage
    - - non-keratinized
        stratified squamous epith.
    - - keratinized stratified squamous
        epith.
  - - - Filiform papillae
        
        Do not contain taste buds
        
        keratinized stratified squamous epith.
        
        Overlapping, brush-like processes
      - Fungiform papillae
        
        stratified squamous epith.
        
        Shaped-like mushroom
      - Circumvallate papillae
        
        Dome-shaped
        
        keratinized stratified squamous epith.
      - Foliate papillae
        
        non-keratinized stratified squamous epith.
        
        Only found in fetus
  - - - Crown
        
        above gum
      - Neck
        
        connect between crown & root
      - Root
        
        within gum
      - Pulp cavity
        
        Dental pulp : loose connective tissue
        with nerves & blood vss.
    - - keratinized stratified
        squamous epith.
- - - - Simple columnar epith.
      - Lamina propria : gastric glands
        
        Mucous neck cells
        
        Chief or Zymogenic cells
        
        secrete pepsinogen & gastric lipase
        
        Parietal or Oxyntic cells
        
        secrete HCl
    - - loose cnt. with collagen & elastic fibers
    - - Smooth muscle 3 layer
        
        inner oblique
        
        middle circular
        
        outer longitudinal
    - - Simple squamous epith.
  - - - Non-keratinized stratified squamous epith.
    - - esophageal gland: mucous gl.
    - - Upper : skeletal m.
      - Middle : skeletal & smooth m.
      - Lower : smooth m.
    - - loose cnt. :most of collagen fibers
  - - - Simple columnar epith.
      - intestinal gland
      - muscularis mucosae: discontinuous layer
    - - Brunner’s gland : mucous gl.
        
        secrete alkaline mucous
    - - Smooth muscle 2 layer
        
        inner circular
        
        outer longitudinal
  - - - Simple columnar epithelium with goblet cells
      - Lamina propria : intestinal gland
    - - No gland
      - Plica circularis (การยกตัวของชั้น mucosa กับ submucosa)
    - - Smooth muscle 2 layers
        
        inner circular
        
        outer longitudinal
    - - Mesothelium
  - - - Simple columnar epithelium with goblet cells
      - Lamina propria : intestinal gland
    - - Lymphatic nodule เรียกว่า Payer’s patches
    - - Smooth muscle 2 layers
        
        inner circular
        
        Outer longitudinal
    - - Mesothelium
  - - - Simple columnar epithelium with goblet cells
      - Lamina propria : intestinal gland
    - - No gland
      - มี blood vessels & lymphatic nodule
    - - Smooth muscle 2 layers
        
        inner circular
        
        Outer longitudinal
    - - Mesothelium
- - - - inner circular
      - outer longitudinal
- - - - Simple columnar epithelium
      - มี Crypt of Lieberkuhn จำนวนมาก
    - - Stratified squamous epithelium
      - No gland
  - - - inner circular
      - outer longitudinal