Lower intestinal tract
The lower intestinal tract, simply known as the intestines, bowels, or gut, was a two-part anatomical system, made up of the small intestines and large intestines, designed to transfer digested food to the circulatory system or to expel waste, in the form of feces and urine, from the body. It was part of the digestive system and made up the second half of the digestive tract.

A diagram of the Human torso depicting the location of the large intestine was stored in the 's library computer database. This database was accessed by the Talosians in 2254. ()

In Takarans, the large intestine and small intestine was located in the . ()

Though Joe Tormolen's 2266 intestinal wound was not severe and Doctor Leonard McCoy intervened in what should have been enough time, the lieutenant junior grade died anyway, due to giving up. () 

The Human small intestine was lined with millions of villi to enable them to absorb nutrients.  McCoy mentioned this in 2269, comparing a part of the cosmic cloud to a small intestine. ()

In 2365, Ira Graves described Data as "a walking tin can with circuits for intestines". ()

The Hirogen might collect the intestines of prey, along with many other body parts. They considered Human intestines to be an unusual  due to being long and coiled. ()

See also 
Appendix
Intestinal bug
Intestinal rotation
Stomach
Villi

External link 
 

de:Darm
Anatomy