If an Organ of the Digestive Tract Were Missing or Dysfunctional

If an organ of the digestive tract were missing or dysfunctional the tract might be compromised EXCEPT in the case of the:

A) oral cavity, which contributes to palatability and swallowing
B) stomach, which enables vitamin B-12 to be absorbed
C) duodenum, which allows pH adjustment and pancreatic enzyme admixture
D) appendix, which absorbs micronutrients and processes sugars
E) colon, which ferments non-starch polysaccharide and starch resistant to digestion