Page 15 - Science Class 07

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How Do Animals Get Their Food?

• Nutri on in Animal s • Phases of Nutri on in Animals
• Nutri on in Human Beings
• Important Organs Involved in Nutri on and Their Func ons
• Nutri on in Ruminants

• Nutri on in Amoeba

Did you ever wonder what happens to all the organisms who are parasites living on other
food that you eat? How does your body digest animals and plants.
it and use it? How about the food require-
ments of other animals? Are they same for all?
Obviously not! Animals cannot make food on
their own. They depend on plants for their food Very few of animals, e.g., the protozoa,
either directly or indirectly. And therefore, euglena, volvox which contain chlorophyll
nutri on in animals is said to be heterotrophic. have retained autotrophic mode of nutri on.

NUTRITION IN ANIMALS

The mode of nutri on where organisms
depend on other organisms for their food
requirements is called heterotrophic nutri on.
Animals are called consumers as they depend
on autrotrophs for their nutri on require-
ments. So, nutri on in animals is heterotrophic PHASES OF NUTRITION IN ANIMALS
in nature. In animals, the nutri on takes place in different

Now, this dependence on other animals may phases. These phases are:
be of different types. Some organisms such as v Inges on v Diges on
fungi break down the food outside the body v Absorp on v Assimila on
and then absorb it. There are some more
v Eges on

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