As you look around the squishy belly, a sphincter catches your eye. You can only hope that this isn't the rear exit as you reach your hands through it's frail and easily pushed through entrance. As you get your head through however, you are met by villi. You known enough about the digestive system that he villi lining the walls mean this is the small intestine. You push your entire body through, and laugh as some villi brush against you, tickling you. You can't avoid them due to how cramped they are.