This post contains many high yield images that help to identify some of the identifying features of the jejunum. If you haven't already, be sure to read A Histology Tour of the GI Tract- Small Intestines Overview before continuing...
After food has traveled through the duodenum, it continues on to the jejunum, which is the second segment of small intestine.
Functions of the Jejunum
Villi have absorptive function