Final answer:
Nutrients are divided into macronutrients (carbohydrates, proteins, lipids, and water) and micronutrients (vitamins and minerals). Macronutrients are needed in larger amounts and provide energy, while micronutrients are needed in smaller amounts, but are crucial for regulation and disease prevention. Water, though a macronutrient providing no energy, is essential for various bodily functions.
Step-by-step explanation:
Classes of Nutrients
Nutrients are substances the body needs for energy, building materials, and control of body processes. There are six major classes of nutrients: carbohydrates, proteins, lipids, water, vitamins, and minerals. These are divided into macronutrients and micronutrients based on the quantities the body requires them.
Macronutrients include carbohydrates, proteins, and lipids, needed in larger quantities. They are primarily the body's source of energy. Carbohydrates and proteins provide four Calories per gram, while lipids provide nine Calories per gram. Good sources of carbohydrates include grains, fruits, and vegetables. Proteins are found in meat, dairy, and legumes and are essential for body repair and growth. Lipids are present in oils, butter, and nuts, they are crucial for storing energy and insulating the body.
Vitamins and minerals are micronutrients, required in smaller quantities compared to macronutrients, but they play critical roles in body functions, including the regulation of metabolism and protection against diseases. Unlike macronutrients, micronutrients are not used for enImportance of Waterergy.
While water does not provide energy, it is considered essential for life. It assists in numerous bodily functions including temperature regulation, transportation of nutrients and waste, and acting as a solvent.