The large intestine is a flexible tube approximately 3 inches wide and about 5 feet long ... the large intestine is made up ...

The brush border protrudes into the GI chyme. There are 3 layers of smooth muscle in the small intestine. One is circular and the other 2 run longitudinally. The wall of the small intestine is ...

Purdue University scientists isolated it from layers of tissue called small-intestine submucosa, or SIS, after they discovered more than a decade ago that the small intestine possessed unusual healing ...