FOOD&OUR DIET

Food is in fact that fuel that keeps us Food is in fact that fuel that keeps us going like the petrol in cars, coal in going like the petrol in cars, coal in

engines and diesel in engines and diesel in truckstrucks..

Our body can be compared to a Our body can be compared to a machine and is often called themachine and is often called the

living machineliving machine

Difference between Difference between machines and living machines and living

beingsbeingsMACHINESMACHINES

• Only one kind of fuel is needed by Only one kind of fuel is needed by a particular machine to do work, a particular machine to do work, e.g. car-petrol.e.g. car-petrol.

• Only one kind of fuel is sufficient Only one kind of fuel is sufficient to run the machine.to run the machine.

• There is a heavy loss of parts due There is a heavy loss of parts due to wear and tear. This needs to wear and tear. This needs replacement.replacement.

LIVING BEINGSLIVING BEINGS

• Different organisms need Different organisms need different types of food as fuel, different types of food as fuel, e.g. tiger-meat; cow-plantse.g. tiger-meat; cow-plants

• Different types of foods are Different types of foods are needed to maintain and run a needed to maintain and run a body. Just one kind is not body. Just one kind is not enough.enough.

• A proper healthy diet helps to A proper healthy diet helps to maintain, repair and replace all maintain, repair and replace all the worn out parts of the body.the worn out parts of the body.

MACHINESMACHINES

• A machine does not grow A machine does not grow in size as it grow olderin size as it grow older..

• Energy is released at very Energy is released at very high temperature.high temperature.

• Machines can be switched Machines can be switched on or off.on or off.

LIVING BEINGSLIVING BEINGS

• They grow in size as they They grow in size as they grow older. Growth may grow older. Growth may stop after a certain age.stop after a certain age.

• Energy is released at low Energy is released at low temperatures; in the temperatures; in the human body at 37ºC human body at 37ºC (normal body (normal body temperature).temperature).

• They function throughout, They function throughout, and cannot be switched and cannot be switched off.off.

“Food is the basic commodity which is absolutely essential to keep a living being alive & healthy.”

For living organisms, food is For living organisms, food is more than a fuel. more than a fuel.

Healthy food gives our bodies the tools they need to:

build bones and muscles - GROWTH repair and replace worn out cells- REPAIR keep all systems working- ENERGY keep us healthy.- HEALTH

So it is really important that we give our bodies the right kinds of food to do the job.

If we don't eat food, then our bodies If we don't eat food, then our bodies don't work.don't work.

If we don't eat the right food, our bodies don't work as well as they can.

WHAT ARE THE RIGHT WHAT ARE THE RIGHT KIND OF FOOD ?KIND OF FOOD ?

WHAT IS WHAT IS OUR DIETOUR DIET ? ?

When our food contain all the When our food contain all the six chemical substances in six chemical substances in

rightright proportion . proportion .

NUTRIENTS

They are- Carbohydrates Proteins Fats Mineral salts Vitamins Water Nutrient are chemical components of food that supply

nourishment to the body. They are required by the body in right amounts and They must be eaten regularly. They are essential for good health.. If one or more are lacking from our diet, we may

become ill.

CLASSIFICATION OF FOOD/FUNCTIONS OF FOOD

FOOD

ENEGRGY GIVING FOODS BODY BUILDING FOODS PROTECTIVE & REGULATORY FOODS

Carbohydrates,Fats.proteins proteins Vitamins & minerals

•Cereal, pulses, roots &tubers•sugars & fats & oils

•Milk ,egg, meat, fish•Pulses, oil seeds and nuts

•Milk, egg, fish, liver•Green leafy veg .& some fruits

A diet which contains all these A diet which contains all these substances in right proportions substances in right proportions

is calledis called COMPLETE COMPLETE OROR BALANCED DIETBALANCED DIET

TO MAINTAIN A BALANCED DIET MUST CONTAIN FOOD ITEMS,

FROM EACH OF THE FOLLOWING GROUPS

Bread, cereal, rice, pasta and noodles

group

This is the biggest group because you need to choose most of your daily food from here.

YOU GET: carbohydrates (car-bow-hide-rayts), the

food your body uses for energy. B vitamins some calcium (cal-see-um) iron fibre, which helps move the food along

through your gut (intestines).

You need  5-9 servings of these every day.

Vegetables group

Lots of vegetables are very good for you, and there are lots of different ones around.

You get: vitamins minerals Carbohydrates fibre

You need 4 or 5 servings of these every day

Fruit

There are heaps of different fruits, including canned and dried, so it is pretty easy to eat plenty.

You get: vitamins carbohydrates fibre minerals.

These types of foods keeps us healthy

You need  2 or 3 servings every day

Milk, yoghurt and cheese group

This group (sometimes called dairy products) is pretty important for

growing kids. You get: calcium protein Vitamins

These types of foods help to build & repair our bodies.

You need 2 to 4 servings every day.

Meat, poultry, fish, beans, eggs, nuts and

legumes

This group is just as important to keep you healthy,

your body doesn't need as much from this group as the others.

You get: o protein o iron o Vitaminso minerals You need a half to 2 servings from this group each day

This group is just as important to keep you healthy, but you can see from the size of the serving on the plate that your body doesn't need as much from this group as the others.

'Poultry' just means chicken, turkey and other birds.

Fats and oils

Fats and oils are not in the healthy food circle.  They are down in one corner as foods that you need a bit of but not too much.

Your body still needs them, but they can be found in other foods like meat and dairy products.

These types of foods also give us Energy.

To eat a healthy diet:

eat enough food from each group every day choose different kinds of foods from each group every day (it gets

boring eating the same thing all the time doesn't it?) eat plenty of plant foods (the two biggest groups). eat some animal foods (meat and dairy products). eat little from the 'sometimes' foods. drink lots of WATER! get plenty of exercise