LieberküHn Crypts

The Lieberkühn crypts are tubular depressions of the small intestine and colonepithelium from which small intestine juice is released into the intestinelumen with enzyme. In the small intestine they flow between the villi, in the large intestine freely into the intestinal lumen.

https://de.wikipedia.org/wiki/Lieberkühn-Krypten _{(Wikipedia CC-by-sa-3.0)}