PROCESSES OF ANIMAL NUTRITION

PROCESSES OF ANIMAL NUTRITION

Nutrients.:- They are of two types

(1) Micronutrients or Protective principles of food.
(2) Macronutrients or Proximate principles of food.

Proximate principles of food constitute the energy sources for the production of heat and different organic
functions e. g. carbohydrate, lipid and proteins. Minerals, vitamins and water are micronutrients because
these do not provide energy, yet their deficiencies are related to specific diseases and abnormalities in man.

· Ingestion : Process of intake of food materials.

· Digestion The conversion of large, complex, insoluble molecules of nutrients into small, simple and soluble and absrobable form.

Types of digestion

Extracellular : Digestion outside the cell I. e., in gut or GVC. (Gastro Vascular Cavity)
Intracellular : Digestion within the cell. e. g., protozoans, sponges.

· Assimilation : Converting absorbed food materials into the cellular components for their utilization.
* Egestion The removal of undigested and unabsorbed part of food (waste) from the body.