Online Notes of CBSE Class 10 Science - Nutrition in animals
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In this article, we have discussed steps in the process of nutrition in animals.
All animals can be divided into three groups on the basis of their food habits. These are:
- Herbivores
- Carnivores
- Omnivores
Different steps in the process of nutrition in animals
There are five steps in the process of nutrition in animals.
- Ingestion: the process of taking food, drink, or another substance into the body by absorbing it.
- Digestion: the process in which the food containing large, insoluble molecules is broken down into small water-soluble molecules is called digestion.
- Absorption: this is the process by which the digested food passes through the intestinal wall into the bloodstream is called absorption.
- Assimilation: The process in which the absorbed food is taken in by the body cells and used for energy, growth, and repair is called assimilation.
- Egestion: The process in which the undigested food is removed from the body is called egestion.
Nutrition in Simple Animals:
Amoeba and paramecium are two very simple unicellular animals. In unicellular animals, all the processes of nutrition are performed by the single cell.
Nutrition in Amoeba:
- Amoeba eats tiny plants and animals as food which floats in water in which it lives.
- The mode of nutrition in Amoeba is holozoic.
- The process of obtaining food by Amoeba is called phagocytosis.
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