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Esophagus, Stomach, Duodenum

Esophagus
  • Toggle Item
    Esophagus 4X
    A: Stratified squamous epithelium

    B: Muscularis Mucosa

    C: Subesophageal gland

    D: Submucosa

    E: Muscularis externa
  • Toggle Item
    Esophagus 20X
    A: Epithelium

    B: Muscularis mucosa

    C: Subesophageal gland

    D: Submucosa
Stomach
  • Toggle Item
    Stomach 4X
    A: Gastric epithelium is simple columnar epithelium

    B: Gastric glands have differential staining due to the different cells that make up the gastric gland. The parietal and the chief cells cause the gland to stain pink and purple respectively. The glands also cause the stomach to have a characteristic crenelated castle wall shape.

    C: The submucosa of the stomach is full of vasculature and loose connective tissue
  • Toggle Item
    Stomach 10X
    A: Simple columnar epithelium lines the interior of the stomach

    B: The gastric pits are invaginations in the wall of the stomach. These give the stomach mucosa a crenelated wall effect.

    C: Parietal cells stain pink due to their acidic product hydrochloric acid

    D: Chief cells stain purple due to their basic product pepsinogen
  • Toggle Item
    Stomach 40X
    A: Simple Columnar epithelium

    B: Gastric pits line the inside of the stomach increasing the surface area
  • Toggle Item
    Gastric 4X
    A: Gastric epithelium is simple columnar epithelium

    B: Gastric glands have differential staining due to the different cells that make up the gastric gland. The parietal and the chief cells cause the gland to stain pink and purple respectively. The glands also cause the stomach to have a characteristic crenelated castle wall shape.

    C: The submucosa of the stomach is full of vasculature and loose connective tissue
  • Toggle Item
    Gastric 10X
    A: Simple columnar epithelium lines the interior of the stomach

    B: The gastric pits are invaginations in the wall of the stomach. These give the stomach mucosa a crenelated wall effect.

    C: Parietal cells stain pink due to their acidic product hydrochloric acid

    D: Chief cells stain purple due to their basic product pepsinogen
  • Toggle Item
    Gastric 40X
    A: Simple Columnar epithelium

    B: Gastric pits line the inside of the stomach increasing the surface area
Duodenum
  • Toggle Item
    Duodenum 4X
    A: Mucosa

    B: Submucosa

    C: Muscularis externa
  • Toggle Item
    Duodenum 10X
    A: Goblet cell is a unicellular glycosaminoglycan producing exocrine gland

    B: Striated simple columnar epithelium lines the lumen of the small intestine

    C: Mucosa houses the epithelium, goblet cells, lamina propria which is just beneath the epithelium, enteroendocrine cells and the paneth cells.

    D: Muscularis mucosa is a thin smooth muscle layer just beneath the mucosa

    E: Brunner's glands set the duodenum apart from the rest of the small intestine as it is only found here. It is a compound multicellular branched tubular exocrine gland

    F: Inner circular smooth muscle layer of the muscularis externa

    G: Outer longitudinal smooth muscle layer of the muscularis externa
  • Toggle Item
    Duodenum 20X
    A: Striated simple columnar epithelium

    B: Goblet cell

    C: Paneth cells are unicellular exocrine glands that produce antimicrobial peptides. They stain acidphilic or red and are located at the bottom of the crypts in the small intestine
  • Toggle Item
    Duodenum 20X
    A: Outer longitudinal smooth muscle layer

    B: Auerbach's nerve plexus is located throughout the small intestine

    C: Inner circular smooth muscle layer

    D: Submucosa

    E: Brunner's gland secretes bicarbonate to neutralize contents coming from the stomach

    F: Mucosa