People with colostomies must wear an ostomy pouching system to collect intestinal waste. Ostomy pouching systems collect waste that is output from a stoma. In deuterostomes, the mesoderm forms by enterocoelic pouching, through invagination of the endoderm. Pouchong was exported under the name "Formosa Pouching". Pouching systems are most commonly associated with colostomies, ileostomies, and urostomies.