What are dietary fibers also known as?

Dietary fibers are also known as roughage. They are present in edible plant parts like stems, leaves, fruits, etc.  

Unlike fats, proteins, or carbohydrates, dietary fibers cannot be broken down during digestion for absorption. Thus they pass through the digestive tract as it is thereby clearing the tract in the process. They promote the growth of good bacteria in the gut. They help to normalize bowel movement, lower cholesterol levels, and control blood sugar levels also.