The types of nutrition in animals
Answers
ANSWER :
There are two modes of nutrition. They are:
1) Autotrophic
2) Heterotrophic
Heterotrophic Mode of Nutrition
All the animals cannot make their own food from simple inorganic material like carbon dioxide and water. They depend on other organisms for food. This is called heterotrophic mode of nutrition. The organisms which depend on other organisms for food are called heterotrophs. For example, man, dog, cat, deer, tiger, cow, non-green plants like yeast are all heterotrophs. They depend on plants or other organisms for their food.
There are three types of heterotrophic mode of nutrition. They are:
i) Saprotrophic nutrition
ii) Parasitic nutrition
iii) Holozoic nutrition
There are five steps in the process of nutrition in animals. They are:
1) Ingestion
2) Digestion
3) Absorption
4) Assimilation
5) Egestion
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Answer:
There are five main steps in the process of nutrition in animals. These are - ingestion, digestion, absorption, assimilation and egestion.
Explanation:
Animal nutrition is a process of taking food by an organism and its digestion, absorption and utilisation by the body.
1. Ingestion: The process by which the food is taken inside the body of an organism is called in ingestion.
2. Digestion: The breakdown of complex, insoluble food substances into simple soluble food substances with the help of digestive juices prepared by the body is called digestion.
3. Absorption: The process in which the simple soluble digested food substances are absorbed into the blood is called absorption.
4. Assimilation: The simple soluble absorbed food substances are transported to the different parts of the body where they are utilised for energy growth and repair. This process is called assimilation.
5. Egestion: A part of the food that we eat, remains undigested and unabsorbed. It cannot be utilised by the body. The process in which the undigested food is removed from the body is called egestion.