Thin and flat body keeps the nutrients and allow the efficient amount of gas from the external environment. Flatworms have well-developed locomotor appendages, and most of the Flatworms consist of one way of digestive system.
Nutrient, comprises chemical compounds in food that allow human body to get proper and well functioning and maintain health of person.
There are various nutrients in the food, approximately more than 40 types of food in the human like Carbohydrate, Proteins, Fats, Vitamins, Minerals, Dietary fiber and water.
Thus, Thin and flat body keeps the nutrients and allow the efficient amount of gas from the external environment.
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