Lesson 12.1 - The Need of Food

• Carbohydrates - are the body's main source of energy.
• Proteins - are used in the synthesis of enzymes, hormones, and antibodies that combat disease.
• Fats - are also energy-providing foods.
• Vitamins - are complex organic molecules needed in small amounts and cannot be manufactured by the human body.
• Minerals - are inorganic substances that do not provide energy but are important for different body functions.
• Water is essential to life because it helps maintain homeostasis (balance) within cells and tissues.
• Nutrition are molecules in food that provide the body with energy and materials essential for growth and development.
• What is nutrition?

  The Study of nutrients and how the body uses them.