[Solved] Discuss the criteria that are used to assess the effectiveness of leadership. Occult Blood Testing: A laboratory test used to detect blood in the stool that is not visible to the naked eye, often used to screen for colorectal cancer. Small Intestine: A part of the gastrointestinal tract between the stomach and large intestine, where most digestion and absorption of nutrients occurs. Digestion: The biological process of breaking down food into absorbable components using enzymatic actions in the gastrointestinal tract. Large Intestine: The last section of the digestive system, where water is absorbed and stools are formed.