The process involving the intake of food, and the conversion of food substances into living matter is called nutrition. It consists of the following:

  1. Feeding
  2. Digestion – where large molecules are broken down into smaller ones, and can be absorbed by the cells in the body.
  3. Absorption – the process where food molecules are absorbed into the cells of the body
  4. Assimilation – where food materials are converted into new protoplasm, or used to provide energy.

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