Catabolism is the process by which our bodies break down complex molecules into simpler ones, releasing energy in the process. This energy is essential for various bodily functions, such as movement, growth, and maintaining body temperature. For example, when we eat food, our bodies catabolize carbohydrates, fats, and proteins to extract the energy needed for daily activities. During catabolism, large molecules like glucose and fatty acids are broken down into smaller units, such as carbon dioxide and water. This breakdown not only provides energy but also helps in recycling cellular components. Overall, catabolism plays a crucial role in keeping our bodies functioning efficiently.