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e. Friendly /Familiar (User Friendly)

Modules should also meet the rules of user friendly or friendly / familiar with the

wearer. Every instruction and exposure to information that appears is helpful and

friendly to the wearer, including the ease of the user in responding and accessing as

desired. The use of language that is simple, easy to understand, and uses commonly
used terms, is one form of user friendly.

2.1.3 Characteristics of Digestive System Material

The human body has cells that need nutrients such as proteins, fats, minerals,

vitamins, water and carbohydrates (Azizah, 2021). To digest food, humans have food-

digesting organs. All food digesting organs form a system that cannot be separated
from each other (Khamim, 2019). The functions of digestive istem (ranging from the

mouth to the anus) include breaking down food into nutrients (a process called

digestion) and absorbing nutrients into the bloodstream.

Vigilance and knowledge are needed to avoid diseases or disorders that will

threaten, such as paying attention to the cleanliness of food and drinks that we will
consume and consume nutritious food. One of the disorders and disorders of the

digestive system is malnutrition. Malnutrition is a condition caused by an imbalance

between food intake and nutritional needs.
Stunting is one of the malnutrition conditions associated with past nutritional

insufficiency so that it is included in chronic nutritional problems. Stunting is

measured as nutritional status by paying attention to the height or length of the body,

lifespan, and gender of the toddler. Stunting is one of the focuses on nutrition
improvement targets in the world until 2025 (Sutarto, 2018).