Proteins

Introduction to the Digestive System of the Human Body

Proteins are a large category of organic compounds formed from the elements

  • Carbon (C),
  • Hydrogen (H),
  • Oxygen (O) and
  • Nitrogen,
  • and, in some cases, also Sulphur (S) and Phosphorus (P).

There are many different protein molecules - all have complex structures formed by one or more polypeptide chains of linked amino acids.


Why are proteins important
?

  1. Protein is one of the three main parts of the human diet - the others being fat and carbohydrates.
  2. Proteins are essential as chemical "building-blocks" within the body because they form the material structures of many tissues, muscles and organs.
  3. Proteins are also important because of their roles regulating bodily functions, enzymes and hormones.

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