Introduction About Sources Of Food:
Food provides energy for day to day living. Food is essential for all the living organisms.. Food helps the body to function normally. Some of the foods come from animals and other foods come from plants.
Nutrition is the science which tells us about what happens to the food when it enters our body and thereafter. The food we eat contains many chemical substances. These chemical substances are known as nutrients. Food is the edible or potable substance (usually of animal or plant origin), consisting of nourishing and nutritive components such as carbohydrates, fats, proteins, essential mineral and vitamins, which (when ingested and assimilated through digestion) sustains life, generates energy, and provides growth, maintenance, and health of the body.
Organisms require food for the following purposes:
- to provide energy for various activities of the body
- for growth and development of the body
- to protect the body from diseases and keep it healthy
- for repair of injured body parts
- for reproduction
Plants As Source Of Food :
Green plants can prepare their own food. For this reason, they are known as producers. They prepare more food than what they need themselves. This extra food is stored in different parts of the plant body. Different plant parts from which food is obtained are the roots, stems, leaves, flowers, seeds and fruits. The plant parts which are eaten are called edible parts. For example, the edible part in a mango is the fruit; in onion and potato, it is the stem while in radish and carrot, it is the root, and leaf is the edible part in cabbage.
Animals As Source Of Food :
A variety of food products are obtained from animals. These include milk and milk products, eggs, meat and honey.
Dairy products are made from milk. Some dairy products are paneer, cheese, butter, ghee and curd.
- Animals which provide meat and egg are called poultry.
- Poultry products are rich in proteins.
Honey is a sweet liquid produced by honeybees from the nectar (sweet juice produced by flowers). It consists of sugar, water, minerals and enzymes. Honey is stored in beehives.
Type Of Food :
Most plants can prepare their own food. Animals including human beings, on the other hand, cannot. They either eat plants or other animals.
(i). Herbivores or herbivorous animals (Herbi = plant, vore = eater) eat only plants or plant products. Cow, buffalo, horse, deer, goat and elephant are herbivores.
(ii) Carnivores or carnivorous animals (Carni = meat, vore = eater) eat other animals. Lion, tiger, dog and jackal are carnivores.
(iii) Omnivores or omnivorous animals (Omni = all, vore = eater) eat both plants and animals. Human being, crow, cockroach and squirrel are omnivores.
Useful for CBSE, ICSE, NCERT & International Students
Grade : 4
Subject : Evs
Lesson : Food
Topic: Sources Of Food
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