Diet, ageing and genetic factors in the pathogenesis of diverticular disease

Figure 2 Physiological activity within the large bowel. Schematic of the human colon highlighting functional roles; the right colon is associated with high microbial activity, larger fecal volume and parasympathetic control. DD in the right colon is infrequently observed in western populations but commonly found in Asian populations. The left colon is the primary site of diverticula in western populations and has lower microbial activity, decreased fecal volume and is more responsive to voluntary control.