Colostomy
A colostomy is a surgically-created opening into the colon (large intestine) through the abdomen. Its purpose is to allow the stool to bypass a diseased or damaged part of the colon. The output from a colostomy includes liquid or formed stool (or somewhere in between), gas, and odor.
◎ A colostomy can be made at almost any point along the colon.
◎ Where the colostomy is created will be dependent on the medical reason and is often defined by the portion of the colon involved.
◎ There are four different kinds of colostomies, and a colostomy may be temporary or permanent.

Ileostomy
An ileostomy is a surgically created opening into the small intestine through the abdomen. The output from an ileostomy after surgery is generally a steady liquid type of drainage.
◎ An ileostomy is usually located on the lower right-hand side of the abdomen.
◎ The digestive enzymes make the output from your stoma very corrosive, so protecting the skin around your stoma, or peristomal skin, is extremely important.
◎ An ileostomy may be temporary or permanent.

Urostomy
A urostomy is a surgically-created opening to drain urine. The output from a urostomy is urine and possibly some mucus.
◎ An ileal conduit is the most common type of urostomy. It is created by removing a short segment of the small intestine (ileum) and using it as a pipeline for urine to flow out of the body.
◎ A urostomy is generally a permanent ostomy.

Reference: Hollister Incorporated