Definition of Nutrition
The process by which living organisms obtain energy to perform all their functions of life to make important materials and to maintain their structure is called Nutrition.
All organisms require energy in order to stay alive. Energy is utilized to do the various bodily functions such as breathing, ingesting and digesting food, excreting, reproducing, locomotion, etc. Energy is obtained from food. Thus the process of intake of food is vital for the survival of an organism as it provides energy. This intake of food is called nutrition
Nutrition can be defined as the process by which an organism obtains food that is used to provide energy and materials for its life sustaining activities.