NUTRITION I

Nutrition I: food and digestive system

I can…

1- Understand the function of nutrition and the processes involved.

2- Identify nutrients and classify them into specific groups.

3- Understand the importance of fibre.

4- Describe a healthy diet.

5- Identify the three stages of the digestive process.

6- Interpret nutritional information on food labels

ENERGYtoEat

Beat

Think

Walk

Breathe

Our body never stops working, so it needs…

2.BUILDING MATERIALS

TO

GrowRepair

damage that

occurs in

the body.

Our body also needs…

Childhood and puberty

Adults

Nutrition starts when we eat food.

Cells in our body transform

nutrients into energy and

building materials using OXYGEN.

Food contains NUTRIENTS.

Nutrients + oxygen =

ENERGY

BUILDING

MATERIALS

1. Nutrients

FOOD

Can be from

Animalsource

Vegetablesource

NUTRIENTS

Contains

Carbohydrates Fats Proteins Water Vitamins Minerals

We can classify into

1.1Carbohydrates

- They supply energy

- Food high in carbohydrates: potatoes

cereals

bread pasta

1.2Fats or lipids

- They supply energy

Come from animals Come from plants

butter

Red meat

fish chickenHigh in fats low in fats

Dairy products Olive oil

1.3Proteins

- They are necessary to grow.

- They are necessary to repair our body.

Red meat fish

eggs

legumes

nuts

seeds

1.4Water

-- It is the most abundant nutrient in our bodies.

- It transports nutrients and waste around the body.

Vitamins and minerals

- They are necessary for a healthy body.

fruit

vegetables

meat fish

Fibre

- It is a complex carbohydrate.

- It is indigestible to humans but necessary to maintain a healthy digestive system.

fruitvegetables

Whole grains cereals

2. A healthy diet

What is a DIET? A DIET IS THE COLLECTION OF FOODS THAT A PERSON

USUALLY EATS.COMPLETE BALANCED

It includes all of the types of

nutrients

It has the correct

quantityof each

nutrient.

What happens when a diet is not complete or balanced?

We can develope disorders or diseases.

Obesity Growth problems

3. The digestive process

lesson 6

The digestive processThree stages

Digestion Absorption Elimination of waste

HELPER GLANDS:

They produce liquids called

digestive juices.DIGESTIVE

TUBE:They join

together to form a tube.

● small intestine

● pancreas

● liver

● esophagus

● anus

PARTS OF

THE

DIGESTIVE

SYSTEM

B

1.Digestion1. In the mouth, food is crushed and mixed with saliva. A BOLUS is formed.

2. The bolus moves past the pharynx and through the oesophagus.

3. In the stomach, the bolus is mixed with gastric juices to form CHYME.

4. In the small intestine, chyme is mixed with pancreatic juice and bile to form CHYLE.

Digestion

FOOD MOUTHSMALL

INTESTINE

STOMACH

BOLUS CHYME CHYME

SALIVAGASTRIC JUICES PANCREATIC JUICES

2.Absorption

Is when nutrients pass from the digestive tube to the blood.

This occurs in the small intestine.

3.Elimination of waste

After absorption, the small intestine only contains those parts of food that cannot be digested.

This waste moves into large intestine where it is transformed into faeces.

Faeces are excreted out of the body.

No child should go hungry