Alimentary diverticulae, also known as diverticulosis, are small sacs or pouches that form in the lining of the intestine, typically in the lower left side of the abdomen. These sacs protrude through the muscular wall of the intestine and can contain feces or gas. Diverticulae are common in older adults and are often asymptomatic, but they can become inflamed or infected, leading to symptoms such as abdominal pain, bloating, constipation, and diarrhea. This condition is called diverticulitis and may require medical treatment in severe cases. The exact cause of diverticulosis is not fully understood, but it is believed to be related to a low-fiber diet and other factors that contribute to constipation.