Plate 10.193 Duodenum and Jejunum
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Human, 10% formalin, H. & E., 162 x.
In this plate, the structure of the duodenum, and the jejunum can be compared. Both segments contain simple tubular glands composed of columnar epithelium separated by the connective tissue of the lamina propria. In the duodenum, note the presence of Brunner's glands in the submucosa, which are diagnostic for this segment of the small intestine. Brunner's glands are compound tubular and are composed of low columnar cells that secrete mucus. The secretory cells closely resemble the cells of the pyloric glands, which also secrete mucus.
Although these glands were first described in 1679 by J. J. Wepfer, Johann Brunner's father-in-law, credit is given to Brunner, the Swiss anatomist, who drew attention to them in his dissertation in 1687.
See also Plate 192.
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