The digestive system turns food into nutrients that are absorbed by the body and removes waste. The mouth, oesophagus, stomach, small and large intestine, rectum and anus are involved.
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Topic: Introduction to the digestive system
The digestive tract can be thought of as a long muscular tube with digestive organs attached along the way.
Your metabolism is influenced by your age, gender, muscle-to-fat ratio, the food you eat, physical activity and hormone function.