What is nutrition and digestion? Explain the needs of essential nutrient for human beings. Describe the digestive process.

Nutrition is the study of how food affects the body's growth, maintenance, and repair. It involves understanding the components of food and how the body uses them for energy, building and repairing tissues, and maintaining bodily functions. The main components of food are macronutrients (carbohydrates, proteins, and fats) and micronutrients (vitamins and minerals).

Digestion is the process by which food is broken down into smaller components that can be absorbed by the body. Digestion involves both mechanical and chemical processes. The mechanical process begins in the mouth, where food is chewed and mixed with saliva. The chemical process begins with the release of digestive enzymes and stomach acid.

After the food is broken down in the stomach, it moves to the small intestine, where the majority of nutrient absorption takes place. The nutrients are then transported through the bloodstream to the body's cells, where they are ___ _______ ___ ________ _______ ______ ________ _____ ____ ________ ________ ______.
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