DIGESTIVE SYSTEM The digestive system is a series of connected organs that break down food into small, simple molecules that can be absorbed into the bloodstream. These nutrients are then transported to body cells for energy, growth, and repair . All animals possess a digestive system because they must consume organic food. In contrast, plants do not need a digestive system since they produce their own food through photosynthesis using sunlight, water, and carbon dioxide. DIGESTION Digestion is the process of breaking down complex food substances into simple, soluble, and absorbable forms through mechanical and chemical actions . It occurs in two phases: 1. Mechanical digestion , where food is physically broken into smaller pieces by teeth or similar structures. 2. Chemical digestion , where enzymes produced by glands break food molecules into ...
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