Fold 1/2 cup black beans, 1 tablespoon salsa, and 1 slice cheddar cheese in a small flour tortilla. Cook in a dry nonstick pan until the cheese is melted and tortilla is lightly browned. Then wrap it in foil and stick in a plastic baggie for easy transport.
The colon (large intestine) is a distal part of the gastrointestinal tract, extending from the cecum to the anal canal. It receives digested food from the small intestine, from which it absorbs water and ions to form faeces. Anatomically, the colon can be divided into four parts â ascending, transverse, descending and sigmoid. These sections form an arch, which encircles the small intestine.
The internal surface of the sigmoid colon is similar to that of the rest of the large intestine. The smooth mucous membrane lining secretes mucus and enzymes, and the liningâs surface cells can absorb fluids. Most of these activities occur, however, higher up in the intestinal tract.