Sources of Food

The fuel our body needs to keep it working is called food.

The chemical substances present in the food that our body needs are called nutrients.

Foodes provide the following functions:

1.It provides energy for activities.

2.It helps in growth and healing.

3.It protects us from diseases.

SOURCES OF FOOD

The main sources are plants and animals

Green plants or Producers as they are called prepare their own food with the help of sunlight,water and carbondioxide

whereas animals depend directly or indirectly on plants for their food.

Food from plants:

Fruits like apple,mango

Stems like potato sugarcane

Seeds like wheat ,rice,pea

Leaves like spinach, cabbage

Roots like radish,carrot

Flowers like cauliflower,broccoli

Food from animals;

Milk,eggs, meat, honey

Classification of animals according to their food habits:

Herbivores:Plant eatinganimals with sharp teeth in plant and grinding teeth at back.For example cows,horses

Carnivores:Flesh eating animals with long sharp teeth like lion.Birds have strong pointed beaks ,snake have small teeth.

Omnivores;Both plant and flesh eating ,humans are the greatest example

Scavengers:Consume dead bodies

Parasites:Depend on other living organisms for their food for example,mosquitoes

FOOD CHAIN

A food chain shows how a living thing gets its food in a particular environment.It shows us the interdependance of

various organisms in the environment.