Nutrition and Food:We need nutritious food, in proportion, to live well. Just as plants need water and sunlight, humans also need a variety of nutrients for their bodies, good nutrition and growth.

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1}Functions of Food :


1 Protein foods are important for body growth or body structure and tissue repair.


2.Basic starchy foods and fatty acids are needed to provide the energy needed to work.


3.The body needs vitamins and minerals to function properly and help protect against disease.


  1. 4. When all these functions are accomplished in the body, the person is well nourished.


2}Classification of Food and Nutrients:


  •                        *Body Bulding

  •                        *Energy Yielding

  •                       *Protective Foods


Any substance that the body uses to obtain nourishment is called food. That is to keep the body 


alive for its growth and function the eye .We eat many foods. There is no food in nature that 


contains all the nutrients. So to get good nutrients it is important to eat a variety of foods and 


know what nutrients they are and why they are important.


3}Nutrients:


1) Proteins.


2) Carbohydrates- Starches.


3) Fat and oil nutrients.


4) Vitamins.


5) Mineral salts.


6) Water.




4}Body Building Foods:


1. Proteins:


*Proteins are important for growth. That is, many types of human body


*Proteins are essential for the growth of cells, tissues and organs. So pregnant women, lactating 


mothers and children need more protein. small


*People who are injured or have certain diseases that attack the body’s cells need large amounts 


of protein to repair damaged tissue.


*Everyone needs protein. Because our bodies are made of living cells. When those cells die, new 


cells must be made to replace them. For example, the lifespan of red blood cells is about 120 


days. New red blood cells are continuously produced.



5} Daily Protein Requirements :


1 KG of body weight needs a 1 GRAM of Protein







6}Proteins – Functions (uses of Protein):


*For body growth and construction,


*To repair damaged tissue and heal wounds,


*Make blood hemoglobin,


*make proteins in the blood,


*Produce enzymes and hormones, . To secrete breast milk,


*Build immunity and prevent

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