The primary purpose of the digestive system in animals is to break down food into smaller, absorbable components, allowing the body to utilize the nutrients for energy, growth, and repair. The digestive process begins in the mouth, where food is mechanically broken down and mixed with saliva, and continues through various organs like the stomach and intestines, where further digestion and nutrient absorption occur. Waste products from this process are eventually excreted. A well-functioning digestive system is vital for the overall health and vitality of an organism, influencing its energy levels and metabolic functions.