Changes

''Samana vayu'' separates nutritive (''prasad'') and waste (''kitta'') part from ''ahara rasa''. Nutritive part is circulated to entire body after absorption through ''rasayini'' (villi) by ''vyana vayu''. Waste part is excreted as feces, urine and sweat through their excretory channels by ''apana vata''. Absorbed nutritive substances circulate all over the body through seven specific micro channels of each of the seven ''dhatus''.

''Samana vayu'' separates nutritive (''prasad'') and waste (''kitta'') part from ''ahara rasa''. Nutritive part is circulated to entire body after absorption through ''rasayini'' (villi) by ''vyana vayu''. Waste part is excreted as feces, urine and sweat through their excretory channels by ''apana vata''. Absorbed nutritive substances circulate all over the body through seven specific micro channels of each of the seven ''dhatus''.

==== Dhatvagni ====

==== ''Dhatvagni'' ====

Each dhatu has its own transforming agni and srotas. Srotus or micro channels have two functions of carrying and transforming the tissues with the help of their specific dhatu agni. Five bhutagnis, one for each mahbhuta, transform five bhautic elements into the body tissues and organs. Seven dhatuagni or tissue transformers, form the tissue elements of seven dhatus by their needed nutrients. After formation of dhatu, the microchannels permeates them into the organs for functioning. During this transformation process, updhatu or subtissues and dhatumal or waste products are formed. Updhatus of rasa dhatu is breast milk, menstrual blood is updhatu of rakta and tendons and six layers of skin is updhatu of maansa dhatu etc.

Each ''dhatu'' has its own transforming ''agni'' and ''srotas''. ''Srotas'' or micro channels have two functions of carrying and transforming the tissues with the help of their specific ''dhatvagni''. Five ''bhutagnis'', one for each ''mahabhuta'', transform five ''bhautic'' elements into the body tissues and organs. Seven ''dhatvagni'' or tissue transformers, form the tissue elements of seven ''dhatus'' by their needed nutrients. After formation of ''dhatu'', the microchannels permeates them into the organs for functioning. During this transformation process, ''upadhatu'' or subtissues and ''dhatumala'' or waste products are formed. ''Updhatus'' of ''rasa dhatu'' is breast milk, menstrual blood is ''upadhatu'' of ''rakta'' and tendons and six layers of skin is ''upadhatu'' of ''mamsa dhatu'' etc.

Apart from digestion, the gut performs various other significant functions as well. The gut has its own protective mechanism in the form of gut-associated lymphoid tissue, which prevents the entry of pathogens into the bloodstream. The micro-biota in the gut serves vital functions related to various aspects of health. The enteric nervous system of the gut has its own functional significance and has been proven to be very closely associated with the central nervous system functions. The gut secretes several hormone-like substances that are helpful in regulating long-term energy balance. All the factors mentioned are either directly or indirectly dependant on these functional domains of the gut. [ ] [ ] Other forms of agni in this context are indicative of bhūtāgni and dhātvāgni, which in turn, are functionally dependent on jaṭharāgni. ‘Prānāḥ’ in this context may stand for all types of vāta as well.

Apart from digestion, the gut performs various other significant functions as well. The gut has its own protective mechanism in the form of gut-associated lymphoid tissue, which prevents the entry of pathogens into the bloodstream. The micro-biota in the gut serves vital functions related to various aspects of health. The enteric nervous system of the gut has its own functional significance and has been proven to be very closely associated with the central nervous system functions. The gut secretes several hormone-like substances that are helpful in regulating long-term energy balance. All the factors mentioned are either directly or indirectly dependent on these functional domains of the gut. [ ] [ ] Other forms of ''agni'' in this context are indicative of ''bhutagni'' and ''dhatvagni'', which in turn, are functionally dependent on ''jatharagni''. ''Prana'' in this context may stand for all types of ''vata'' as well.

==== Three stages of digestion ====

==== Three stages of digestion ====