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Details for anatomical structure: jejunum

EndoNet ID: ENC00417

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jejunum, , Jejunum

General information

The portion of the small intestine between the end of the duodenum and the ileum; about 8 feet in length, it is distinct from the ileum in being more proximal, of larger diameter with a thicker wall, having largely, more highly developed plicae circulares, being more vasculer with the jejunal arteries forming fewer tiers of arterial arcades and longer vasa recti

Links to other resources

Cytomer cy0036266

Larger structures


      Secreted hormones

      • Hormone: NT

        • Protein kinase D (PKD) family members (PKD1, 2, and 3) have been identified as important regulators of secretory transport at the trans-Golgi network: PKD1 contributes to stimulated NT secretion. [1]
      • Hormone: NmU-25

      • Hormone: GIP

        • Positive GIP cells contained large round, or sometimes irregular, electron-dense, secretory granules, many of these possessed the characteristic dense centralcores, surrounded by a lighter matrix. On the basis of the characteristic appearance of the granules, the cells were identified as K cells. [2]


      • Receptor: PRLR