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‘Pitta’ that is present in between stomach and large intestine is called ‘Pācaka Pitta’. Though made up of five basic elements, it is dominant in fire principle. So, it is devoid of liquidity and is called ‘Anala’ (‘Agni’). This digests the food and splits it into essential nutrient part called ‘Sāra’ and waste part called ‘Kitta’ (A.H. Sū. 12/10-12). The ‘Pācaka Pitta’ is directly responsible for digestion of the food and therefore stands for all amylolytic, proteolytic, lipolytic and nucleic acid splitting enzymes. Gastrointestinal hormones like gastrin, secretin, cholecystokinin etc. also must be regarded as the representatives of ‘Pācaka Pitta’. ‘Sāra’ (Nutrient) portion separated at this stage gets absorbed and thereafter it is called ‘Rasa Dhātu’.
==Release of Bile Juice== In the small intestine, ‘Accha Pitta’ (Bile) is released (Ca. Ci. 15/10) during the second stage of digestion. This stage is called ‘Amla’ ‘Avasthāpāka’ and during this phase, the bile juice and pancreatic juices are secreted into the duodenum. The bile is
liquid and it is called the ‘Accha Pitta’. ‘Accha’ means ‘liquid in form’. This is the ‘Mala’ of ‘Rakta’. Bilirubin is a derivative of hemoglobin metabolism and represents this ‘Accha Pitta’.
==Factors influencing Digestion== Digestion of food depends on following important factors: optimum temperature, ‘Vāyu’, fluid medium, lubricating substances, time and appropriate administration. ‘Vāyu’ helps in movement of food in the gut. Fluids make the food particles easily breakable. Lubricating substances make the food softer. Time factor makes sure that the food is completely and properly digested. Along with all these factors, if the administration also is proper, the resultant digested material will be capable of maintaining ‘Dhātusāmya’(Ca. Śā. 6/14,15).
==Absorption and distribution of Digested Material==
