Question

List the five major steps in animal nutrition

Answer 1

Answer:

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1. Ingestion: is the process of taking food in to the body or ‘eating of food’ by the animal. When we put food in to our mouth with hands, we are ingesting it.

2. Digestion: is the process in which the food containing large, insoluble molecules is broken down in to small, water soluble molecules which can be absorbed by the body or digestion is the dissolving of the solid food. Most of the animals include both physical and chemical methods for digesting the food. Physical method includes chewing and grinding the food in mouth and chemical method include the addition of digestive juices (enzymes) to food by the body itself.

3. Absorption: is the process in which the digested food passes through the intestinal wall in to blood stream. As, after the digestion, food molecules become small and soluble. This food passes through the walls of our intestine and goes in to the blood.

4. Assimilation: is the process in which the absorbed food is taken in by the body cells and used for energy, growth and repair. Blood carries the absorbed food to all the parts of the body.

5. Egestion: is the process in which the undigested food is removed from the body. The whole food which we eat is not digested by our body, a part of the food remains undigested which cannot be used by the body and so it is removed from the body in the form of faces when we go to the toilet.

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Answer 2

Five major steps in animal nutrition:

Animals are generally heterotopic in nutrition, which means that they cannot produce their food, and intakes food from an outside source to assimilate the same into their body.

The main steps of animal nutrition are:

• Ingestion – It means the intake of food into a buccal cavity by means of oral and external muscles.
• Digestion – This is a very obvious step and refers to the chemical breakdown of food particles into simpler food components by means of enzymes secreted from the stomach, salivary glands, pancreas, and small intestine.
• Absorption – It is the intake of the broken down simpler components of food into the blood and lymph.
• Assimilation – This means the incorporation of these absorbed food materials into the animal body.
• Egestion – This means the removal of the undigested food material through the feces.