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Gastrointestinal Tract - Coggle Diagram

- - - - stratified squamous epith. with skin
        appendages
    - - non-keratinized
        stratified squamous epith.
      - associated with mixed seromucous gland
    - - very thin keratinized stratified squamous
        epith.
      - contains vascular connective tissue papillae
  - - - Filiform papillae
        (Most numerous of lingual papillae)
        
        Irregular connective tissue cores with keratinized stratified squamous epith.
        
        Do not contain taste buds
        
        Overlapping, brush-like processes
      - Fungiform papillae
        
        upper surface of tongue
        
        Covered with stratified squamous epith.
        with taste buds
        
        Shaped-like mushroom
      - Circumvallate papillae
        
        Dome-shaped
        
        Covered by keratinized stratified squamous epith. with taste buds around cleft
        
        Von Ebner’s gland
        (serous gl. below cleft)
      - Foliate papillae
        (Only found in fetus)
        
        upper surface of tongue
        
        Covered with non-keratinized stratified squamous epith. with many taste buds
        
        Leaf–like ridges of mucosa
  - - - Crown
        (above gum)
      - Neck
        (connect between crown & root)
      - Root
        (within gum)
      - Pulp cavity
        (loose connective tissue
        with nerves & blood vss.)
    - - keratinized stratified
        squamous epith.
      - Long vascular papillae in lamina
        propria
- - - - Non-keratinized stratified squamous epith.
      - Lamina propria of loose cnt
      - Muscularis
    - - Loose cnt. with blood vss.
      - mucous gland
    - - Upper
        
        skeletal muscle
      - Middle
        
        skeletal & smooth muscle
      - Lower
        
        smooth muscle
    - - Loose CNT
        
        most of collagen fibers
  - - - Simple columnar epith.
        with short microvilli
      - Lamina propria
        (gastric glands)
        
        Mucous neck cells
        (secrete mucous to protectacid)
      - Chief or Zymogenic cells
        (secrete pepsinogen & gastric lipase)
        
        Pyramidal shape
        
        Oval nucleus close to cell base
        
        Blue cytoplasm
      - Parietal or Oxyntic cells
        (secrete HCl)
        
        Large oval shape
        
        Oval nucleus in center of cell
        
        Reddish cytoplasm
    - - Smooth muscle 3 layer
        
        inner oblique
        
        middle circular
        
        outer longitudinal
  - - - Mucosa
        
        Simple columnar epith.with goblet cells
        
        Lamina propria
        (intestinal gland or crypt of Lieberkuhn)
        
        Muscularis mucosae
        (discontinuous layer)
      - Submucosa
        
        Brunner’s gland
        (mucous gland)
        
        secrete alkaline mucous to protect
        intestinal wall
      - Muscularis externa
        
        inner circular
        
        outer longitudinal
      - Adventitia
    - - Mucosa
        
        Simple columnar epith.
        with goblet cells
        
        Lamina propria
        (intestinal gland or crypt of Lieberkuhn)
        
        secrete intestinal juice
        
        Muscularis mucosae
      - Submucosa
        (no gland)
      - Muscularis externa
        (smooth muscle)
        
        inner circular
        
        outer longitudinal
      - Serosa
        
        Mesothelium
        (visceral peritoneum)
    - - Mucosa
        
        Simple columnar epith. with goblet cells
        (more than duodenum & jejunum)
        
        Lamina propria
        (intestinal gland or crypts of Lieberkuhn)
        
        Muscularis mucosae
      - Submucosa
        
        Peyer’s patches
        (Aggregated lymphatic nodule)
      - Muscularis externa
        (smooth muscle)
        
        inner circular
        
        outer longitudinal
      - Serosa
        
        Mesothelium
        (visceral peritoneum)
  - - - Simple columnar epith. with goblet cells
        (secrete mucus to lubricant)
      - Lamina propria
        (intestinal gland or crypts of Lieberkuhn)
    - - No gland
      - blood vss. & lymphatic nodule
    - - inner circular
      - outer longitudinal
    - - Mesothelium
        (visceral peritoneum)
  - - - Simple columnar epith. with goble tcells
      - Less of intestinal gland
      - Laminapropria
        
        lymphoid tissue
        
        lymphatic nodule
    - - lymphoid tissue
      - lymphatic nodule
    - - inner circular
      - outer longitudinal
    - - Mesothelium
        (visceral peritoneum)
  - - - Rectum
        
        Simple columnar epith
        
        Many Crypt of Lieberkuhn
      - Anal canal
        
        Stratified squamous epith
        
        No gland
    - - Inner circular
        (int. anal spincter)
      - Outer longitudinal