welcome to the chapter of human nutrition in this module that is MODULE number one we will be learning about the introduction to human nutrition hi students let’s see what is nutrition yes nutrition here it is nutrition comprises of many things put together first there is a process called ingestion what is ingestion, ingestion means taking in the food after ingestion something comes called as digestion in a couple of minutes i will teach you what is Digestion after the digestion there is absorption do we know what is absorption yes we do then after absorption there’s something called assimilation  this might be a new word for you in brief let me explain assimilation means the food which is absorbed it is going and settling inside the set then after a Assimilation  we have a process called Egestion  what a egestion, egestion means removal of the waste material from the body so a clubbing of all these events that is ingestion digestion absorption assimilation and egestion all together gives us our nutrition now let’s see the functions of nutrition the first function of nutrition is to provide growth to the organism yes because of the food that you eat you are able to grow after growth of the second function is providing energy to the organism obviously if you don’t eat do you think  you will have the energy to do any work no after energy the third function is repair and regeneration means if at all there is anyone or if you’re hurt in the body at any place then the food that you eat the vitamins that you take the nutrients which you take will help in repair and last but not the least it also provides protection by building your immune system let’s come to digestion  a couple of minutes back i had told you i will describe to you what is the digestion let us define digestion ,Digestion can be defined as the process of converting complex non  Diffusible  and non-absorbable food substances into simple diffusible and absorbable substances so how can i define the digestion, the digestion can be defined as the process of converting complex Non diffusible non-absorbable food substances in do simple diffusible and absorbable food substances after this let’s see some food substances do we eat all these yes these are some of our favorite items to eat am i right well what do these food items contain these food items contain nutrients and which are the nutrients yes the nutrients are carbohydrates their proteins they are fat lipids also there is water and vitamins as well as minerals now out of all of these nutrients what we see is the carbohydrates proteins and fats are described to be macro-nutrients why macronutrients their called macro nutrients because they are required and consumed in large quantities then if we see vitamins and Minerals these are known as micro nutrients because they are consumed in smaller quantities so in this module what we learned about what first an introduction to this chapter in the introduction what did we learn we first learn what all comprises in nutrition then we studied the definition of digestion in our next module we will be learning about carbohydrates till then take care