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Events in Human Nutrition Simplified Revision Notes

Revision notes with simplified explanations to understand Events in Human Nutrition quickly and effectively.

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Events in Human Nutrition

  1. Ingestion: taking of food into the mouth.
  2. Digestion: the physical and chemical breakdown of food. This is necessary to allow small molecules of food to be absorbed through the walls of the intestines.
  3. Absorption: small molecules pass from the digestive system into the blood.
  4. Assimilation: the way the body uses the absorbed food molecules (e.g. for energy)
  5. Egestion: the removing of unabsorbed food from the digestive system as faeces.
infoNote

Digestion is the physical and chemical breakdown of food.

infoNote

Egestion is the removing of unabsorbed food from the digestive system as faeces.

infoNote

Note: Egestion is NOT the same as excretion. Excretion is the removal of metabolic waste from the body e.g. carbon dioxide is excreted through the lungs.

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