“Nutrition is the process of taking in food and converting it into energy and other vital nutrients required for life.”
Nutrients are the substances which provide energy and biomolecules necessary for carrying out the various body functions. All living organisms need nutrients for proper functioning and growth. But they show divergence in how they fulfill this demand. Some animals feed on simple inorganic compounds to meet their nutrient requirement, while others utilise complex compounds. The mode of nutrition varies from one species to another. The processes food undergo to bring about nutrient to animals includes
1.Ingestion; An act of taking in the food
2.Digestion; The act of breaking down the food substance into a smaller absorbable molecule by the body
3.Absorption: The process by which the food molecules enters into the blood and carried into the cells where they ar used.
4. Assimilation: The process the cell uses the food for its metabolic activities example, Respiration
5.Egestion. The food substances that was not broken down or used by the cell are removed from the body by egestion.
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