In general, foods are made up of carbohydrates, proteins, and fats, each of which provide a different number of calories: 1  Carbohydrates provide 4 calories per gram. 2  Proteins provide 4 calories per gram. 3  Fats provide 9 calories per gram.
IMPORTANCE OF WATER. Water is our lifeline that bathes us and feeds us. In ancient cultures water represented the very essence of life. The Romans were the first to pipe water into their growing cities, especially with their aqueducts.
Quick Answer. Water is important because the human body has a drought management system that prevents dehydration and water is the most crucial part of that system. Water also helps regulate body temperature, serves as a lubricant and is a natural headache remedy (headaches can be a sign of dehydration). Continue Reading.