Introduction to Digestion. We are what we eat!. What is involved in the process of Digestion?. How would you define digestion? Here’s one definition: a process of breaking down food or macromolecules into smaller molecules for absorption
We are what we eat!
i.e. the act of eating and putting food into your mouth!
2. Digestion = the break down of food by mechanical and chemical processes into molecules small enough for cells of the body to absorb
3. Absorption = the transport of digested nutrients to the tissues of the body
4. Egestion or elimination = the removal of undigested solid waste from the body
= a nutrient that cannot be made by the body, and must therefore be obtained from food