Give the dissimilarity with the disposition of smooth muscle fibres in the muscularis externa of the urinary bladder and that of the stomach​

For a project i need to provide a description of food (ex. salad, pizza). my last two braincells and i can't think of a food to choose so i'm asking the people of to me out - can't be a healthy food (no fruits, vegetables) - can be junk food except pizza if you could provide a description of the food you chose that would be awesome! : d