SCIENCEUNIT 3

FEEDING AND DIGESTION

• DigestionIn digestion,the digestive system breaks down food until we obtain the nutrients. We absorb the nutrients in the small intestine. The residues of the food form faeces.

• The digestive system

• Feeding and nutritionFeeding is taking of food. Nutrients are the useful substances in the food we eat.Nutrition consists of extracting nutrients from the food we eat, and oxigen from the air we breathe, distributing them around the body and excreting the residues.

We classify nutrients as:• Proteins.• Carbohydrates.• Fats.• Minerals.• Vitamins.

• Carbohydrates and fats• These foods give us energy

• Vitamins and minerals• These foods help us stay healthy

• Proteins• These foods help us grow and with our vital functions

• Mixed• These foods contain more than one of the different nutrients

• Our dietOur diet is the quantity and variety of food and water that we take.We must follow a healthy and balanced diet that contains all the different nutrients in the correct quantities.

Lesson vocabularyTo break down: descomponerNutrientTo absorb: absorberFaeces: hecesUseful substances: sustancias útilesTo extract: extraerTo excret: excretarFats: grasasDiet: dietaHealthy: saludableBalanced: equilibrada