6th Class Science Food

Food

Category : 6th Class

 

                                                                       Food

 

Food

Food is a substance eaten by the living organisms in order to remain alive. Fruits, vegetables, eggs, meat, milk, etc. are the examples of food.

 

Sources of Food

Plants: Foods like cereals, pulses, fruits, vegetables, etc. are obtained from the plants.

Animals: Food like meat, milk, eggs, honey, etc. are obtained from animals.

 

Producers and Consumers

All living organisms has been broadly classified into two groups: producers and consumers.

 

Producers: All the green plants make their own food, therefore, green plants are called producers.

 

                               

           

Consumers: Animals consume the food prepared by green plants, therefore, animals are called consumers.

 

Types of Consumers

Consumers have been classified in the following groups on the basis of their food habits:

 

Herbivores

The animals that eat only plants or plant products, are called herbivores. Cow, buffalo, goat, elephant, horse, rabbit, camel, etc. are the examples of herbivores animals.

 

Carnivores

The animals that eat only other animals are called carnivores. Tiger, lion, cheetah, wolf, snake, etc. are the examples of carnivores animals.

Omnivores

The animals that eat both plants and animals are called omnivores. Man, bear, dog, crow etc. are the examples of omnivores animals.

 

 

Scavengers

The animals that eat dead and decaying bodies of other animals are called scavengers.

Vulture, hyena, etc. are the examples of scavengers.

 

 

Decomposers

These are organisms such as bacteria and fungi that break down the dead remains of plants and animals.

 

 

Parasites

The animals that live in or on the other animals for their survival are called parasites. For example, mosquitoes, flees, leeches, etc.

 

 

Components of Food

The food that we eat is composed of carbohydrates, fats, proteins, vitamins, minerals, water, and roughage.

 

 

Functions and Sources of different components of food are given below:

 

Classification

Name of the Nutrient

Source

Function

 

Energy giving food

Carbohydrates (Energy giving food)

Rice, potato, wheat, sugar

Provides energy

Energy giving food

Fats (energy giving food)

Butter, ghee, oil, cheese

Gives more energy as compared to carbohydrates

Protective food

Vitamins and Minerals (protective food)

Fruits and vegetables

Required for normal growth and development

Body building food

Proteins (body building food)

Milk, eggs, meat, fish, soyabean

Helps in building and repairing of body

 

Water

Water, fruits and vegetables rich in water

Helps in digestion

Fibres

Roughage

Fruits and vegetables

Helps in proper digestion

 

 

Balanced Diet

An adequate amount of nutrients, water and roughage are essential for proper functioning of our body.

'The diet, which contains all the nutrients, water and roughage in adequate amount, is called balanced diet'.

 

Deficiency Diseases

The people, who do not get all the nutrients in required amount, suffer from deficiency diseases.

 

Look at the following table:

 

Deficiency diseases

Causes

Kwashiorkor

Lack of proteins

Marasmus

Lack of proteins and carbohydrates

Night blindness

Lack of vitamin A

Beri-beri

Lack of vitamin B1

Scurvy

Lack of vitamin C

Rickets

Lack of vitamin D and calcium

Goitre

Lack of iodine

Anaemia

Lack of iron

 

 

 

Other Topics

Notes - Food
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