 So, in the normal state of equilibrium this support the body and when vitiated they produce the disease we are talking about doshas. So, doshas play important role and pathogenesis, diagnosis and treatment of the disease, vath, pith, cuff these are the doshas as I mentioned. So, let us look at these components in more detail. In the normal state of equilibrium doshas support the body and when these are vitiated they produce disease. These are called doshas because whenever there is a contamination it is reflected in the doshas first. So, kafa, prakriti kafa doshas or vath dosh or pitha dosh, pitha dosh is related to the problem in digestion, vath dosh is reflected in our ability to concentrate or the joint pains. Kafa dosh is reflected in the kafa's in the undue mucus excretion in the nasopharyngeal area. So, doshas are the first thing to get disturbed. So, they play a very important role in pathogenesis and diagnosis as well as treatment and disease management. Mun also moves from sattvic to rajasic or rajasic to tamasic. Rajasic is related to activity and tamas is related to inertness. Raj and tam when they are properly balanced with activity these this state is called sattva. So, disturbance in these aspect of gunas result into lack of health or well being. Dhatus in Ayurveda are correlated with the body tissues. For easy understanding we can say these are the basic seven building blocks of the physical body and they are called rasa, rakt, mans, med, ashti, madja. Let us look at doshas. The entire physiology and pathology in Ayurveda depend upon the status of three fundamental functional units in sharir. What are the three fundamental units in sharir? Doshas, dhatus, malas. These units or bioenergies they control all functioning of body. So, among these three units doshas are always first to get disturbed by various activities. If you have a change in the dietary factor there is a fluctuation in season, time during the day and my engagement with the work, my dhincharia which is my daily routine or rithu charia that is my seasonal routine. Doshas are disturbed, doshas are bad which get disturbed first because of my diet or my dhincharia or routine. There are three types of doshas. First is vath dosa. Vath is derived from word vah that means gati. So, anything related to the movement is related to vath dosa. There are some physiological, functional and physical traits associated with vath dosa and there are some traits and psychological traits which are related to vath dosa. Those who have taken the NPTEL course they must have received a link about assessment of their doshas. So, by taking that assessment which is developed by David Frawley the great scholar by looking at their assessment they can understand whether they have more of vath dosa, pitta dosa or kafa dosa. So, let us talk about the vath dosa. Vath dosa is concerned with mode of movement within the body and therefore governs nerve impulses, circulation, respiration and elimination. This is responsible for maintaining sensory, emotional and mental harmony and it facilitates mental adaptability and comprehension. So, if there is a vath dosa people will find it difficult to concentrate on one topic. Classically people with the prominent vath dosa have a thin body, low body weight and low bone structure. These are the physiological aspects. There are some psychological traits as well associated with vath dosa. These people having more prominent vath dosa are more creative, enthusiastic, fast and responsive people. They have a special drive to achieve goals in life. So, individual with the vath constitution is characterized by short memory, impulsive, they are shy, sensitive and these things also make them little more distracted in comparison to other dosas from one subject to another. So, these are the characteristics, general characteristics of vath dosa. Vath dosa or the word vath is derived from the root tupper which means heat. So, this dosa is responsible for digestion which is pachan and parinaman which is metabolism and digestion. So, vath governs the process of transformation or metabolism by regulating digestion, absorption, assimilation, temperature associated with that, skin coloration and luster of eyes. Pith regulates the digestion on mental and spiritual level as well. That is our capacity to digest impression, emotions, ideas that also come from the pith. So, dosa in the common term is considered as problems or dosas are considered as drawbacks. No, in the Ayurveda dosa are not considered as drawback, these are the basic constituents. These are called dosa because they are the first to show the contamination at physiological and psychological level, but they themselves are not the problems, they themselves are not the errors or drawbacks. These are there in everybody, not only in everybody all the forms of being. So, medium or athletic build is the characteristic of the people having high vath dosa and they are generally having medium height and delicate frame. There are some psychological characteristics associated with the people having more prominent vath dosa or vath prakriti that is intelligence, courage and vitality. They are like they come across as full of energy, courageous people, intelligent people who want to go to the depth of the subject or the people in whom vath dosa is more prominent, they will have multiple interest from one topic to another topic, they can comfortably keep hopping, but pith dosa result into capability of focusing on one thing. Focusing on one topic and go in depth into it, so that is that characteristic given by the pith dosa. Psychologically, pith endangers, anger, hate, jealousy, these are also the side effects of the vath dosa. So, people having vath dosa are supposed to reflect these characteristics, these psychological characteristics also more often. Kaffa dosa is reflection of the bioenergy that is responsible for maintaining the proper water balance, hydration and moisture in our bodies. So, this is responsible for growth, adding structure and governs the lubrication of the body to offer protection and directly influencing the emotions. This dosa is concerned with emotions and it endows with love, caring, devotion, faith which assist in maintaining internal harmony along with the unity with others. A well developed body with a tendency to gain weight is the reflection of kaffa dosa. So, people with the high and more prominent kaffa dosa, they show the characteristic of steadiness, calmness, being compassionate and they are psychologically endanger the emotion of attachment, greed and envy. So, you see there are some physiological characteristics associated with the dosas and there are psychological characteristics also associated with dosas. Those who are registered through NPTEL in this course, they must have received an assessment questionnaire to look at what is their prominent prakriti and vikriti.