Lab 9 digestive tract 2 digestive glands
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Lab 9. Digestive Tract (2) &Digestive glands. Small intestine (N0.1) Large intestine (No.26) Pancreas (No.29) Liver (No.30) Exercise. 20131127. Small intestine. Mucosa epi. lamina propria muscularis mucosa Submucosa Muscularis externa Serosa. Luminal surface modification:

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Lab 9. Digestive Tract (2) &Digestive glands

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Lab 9. Digestive Tract (2) &Digestive glands

Small intestine (N0.1)

Large intestine (No.26)

Pancreas (No.29)

Liver (No.30)

Exercise

20131127


Small intestine

  • Mucosa

    epi.

    lamina propria

    muscularis mucosa

  • Submucosa

  • Muscularis externa

  • Serosa

Luminal surface modification:

1.Plicae circulares

2.Intestinal villi

3.Microvilli


  • Mucosa

  • Submucosa

  • Muscularis externa

  • Serosa

Human jejunum


Villus

  • Epithelium

    1.absorptive cell

    striated border

    (microvilli)

    2.Goblet cell

  • Lamina propria

    CT+SM


  • Intestinal glands

  • Columnar cells

  • Goblet cells

  • Paneth cells

  • at the base of the crypts

  • 3-5 in a group

  • Acidophilic G.


  • Muscularis externa

  • Myenteric plexus


  • Serosa

  • CT

  • Mesothelium


Large intestine

Small intestine


  • No villi

  • No Paneth cell

  • Numerous Goblet cells


Large intestine: Muscularis externa with myenteric plexus


Pancreas

  • Capsule

  • Septa extend into the gland

  • Ill-defined lobule


Exocrine gland

Endocrine gland


Exocrine portion: pyramidal serous cells

centroacinar cells


  • Intercalated ducts

  • Intralobular ducts

  • Interlobular ducts


Intralobular ducts


Intralobular ducts


  • Interlobular ducts

  • Islets of Langerhands: scattered among the exocrine portion


Liver

  • Capsule

  • Parenchyma: hepatocyte


  • Liver lobule

  • Central vein

  • Plates of hepatocytes

  • Sinusoids


  • Liver plates

  • Liver sinusoids: kupffer cells


Hepatocyte, Kupffer cells


Central vein : incomplete wall connect with liver sinusoids


Portal area: Interlobular veins

Interlobular arteries

Interlobular bile ducts


Human liver

Pig liver


  • The end!


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