FOOD AND ITS IMPORTANCE:

1) The food we take in makes up our diet.

2) The food we eat is important for the following purposes:

- for growth - for repair damaged tissues - to provide energy for work, movement and keeping warms. - to maintain health

remember:

G.R.E.H.

Substances in our diet

1. The process of taking food into the body and using it for the living parts of the body is known as nutrition.

2. The food we eat is made up of three main components:I. NutrientsII. WaterIII. Fibre

I. Nutrients

1. Carbohydrates2. Fats3. Protein4. Vitamins5. Minerals

salmon

CARBOHYDRATES

PROTEINS

FATS &OILS

1 2

3

1. CARBOHYDRATES Present in food to give us ENERGY.

Example of carbohydrates are STARCH and SUGARS.

There are many kinds of sugars such as GLUCOSE and SUCROSE.

2. FATS & OIL IMPORTANT source

of energy.

They give us TWICE as much Energy as

carbohydrates.

FATS are usually SOLIDS.

When a fat is LIQUID, it is called an OIL.

3. PROTEIN-Used for growth and repair of

worn-out tissues.

4. Vitamins

Vitamin

Sources Uses Diseases

A Milk, butter, green vegetables, carrots, fish liver oil

For healthy skin and eye

Night blindness

B Milk, fish, bread, green vegetables, yeast, soya beans

For healthy nervous system

Beri-beri

C Oranges, lemons, tomatoes, green vegetables

- For healthy blood,- For healthy gum,- For healthy teeth - some protection from cold

Scurvy

D Milk, eggs, cheese, butter, fish liver oil

To make strong bones and teeth

Rickets

MINERAL SOURCES USES DISEASES

CALCIUM Milk, cheese, green vegetables

To make strong bones and teeth

RICKETS

IRON Liver, meat, green vegetables

For the formation of haemoglobin

ANAEMIA

IODINE Fish, sea food, sea weed

For making hormone thyroxine

GOITRE

FLUORINE (FLUORIDE)

Vegetables, fish, tea, tap water, toothpaste

For the formation of strong bones and teeth

DENTAL (TOOTH) DECAY

C-R-I-A-I-G-F-D

Chicken Rice Is Amazing! I Go For Dinner

5. Minerals

II. Water

• All living things need water to live.• Water carries substances around

the body and helps to remove wastes.• It is the medium for chemical

reaction in the body.

III. FIBRE (ROUGHAGE)

• Fibre is present in all plant food like grains, fruits and vegetable.

• gives bulk to the food and helps it to move through the intestine.

• helps to prevent CONSTIPATION.

Balanced Diet

A diet which contains the right amount of carbohydrates, fats, proteins, vitamins, minerals, water and fibre to maintain good health.

Which of the food shown in the next slide

is your healthy diet?