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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 10 - Digestive System

Plate 10.200 Jejunum

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed


JEJUNUM

Plate 10.200 Jejunum

Human, 10% formalin, H. & E., 612 x.

 

Crypt of Lieberkühn*: Simple tubular intestinal glands in the mucosa that extend through the lamina propria to the level of the muscularis mucosa. The simple columnar epithelium of these glands is continuous with the surface epithelium lining the villi. Undifferentiated epithelial cells of the crypts give rise to the surface epithelial cells covering the villi. In addition to goblet cells, Paneth cells are found in the crypts. The latter contain coarse acidophilic granules that probably represent zymogen. See Plate 197. These cells are located in the depth of the crypt.

Smooth muscle: Circularly arranged in the muscularis mucosae.

Lamina propria: Connective tissue stroma filling the spaces between the crypts. Also see Plates 29 and 198.

Submucosa: Connective tissue coat, containing an abundance of lymphocytes.

*Lieberkühn was an eighteenth-century German anatomist.

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