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→Three stages of digestion
''Accha pitta'' is ‘liquid’ in nature, released in the duodenum and can be correlated with bile.
''Accha pitta'' is ‘liquid’ in nature, released in the duodenum and can be correlated with bile.
''Pachaka pitta'' has the functional site between ''amashaya'' (stomach) and ''pakvashaya'' (colon), which is indicative of small intestine. It is composed of five ''mahabhutas'' but the ''agni mahabhuta'' is predominant; and hence, it becomes devoid of fluidity and therefore is also known as ''agni''. It splits the food into sāra (nutritive) and ''kitta'' (non-nutritive) portions. (Ashtanga Hridaya, Sutra Sthana, 12/10-12).
''Pachaka pitta'' has the functional site between ''amashaya'' (stomach) and ''pakvashaya'' (colon), which is indicative of small intestine. It is composed of five ''mahabhutas'' but the ''agni mahabhuta'' is predominant; and hence, it becomes devoid of fluidity and therefore is also known as ''agni''. It splits the food into sāra (nutritive) and ''kitta'' (non-nutritive) portions.<ref>Vagbhata. Sutra Sthana, Cha.12 Doshabhediya Adhyaya verse 10-12. In: Harishastri Paradkar Vaidya, Editors. Ashtanga Hridayam. 1st ed. Varanasi: Krishnadas Academy;2000.p.4.</ref>
''Sara'' of the food is the minutest fraction (''parama sukshma''). This portion reaches the heart in the form of ''ahara rasa''. From the heart, it then gets re-distributed into 24 pulsatile vessels to be carried into the whole body. (Sushruta Samhita, Sutra Sthana, 14/3)
''Sara'' of the food is the minutest fraction (''parama sukshma''). This portion reaches the heart in the form of ''ahara rasa''. From the heart, it then gets re-distributed into 24 pulsatile vessels to be carried into the whole body.<ref>Sushruta. Sutra Sthana, Cha.14 Shonitavarnaniya Adhyaya verse 3. In: Jadavaji Trikamji Aacharya, Editors. Sushruta Samhita. 8th ed. Varanasi: Chaukhambha Orientalia;2005. p.1</ref>
The portion that reaches the colon is the one that is designated as ''kitta''. During the third stage of digestion, there occurs the solidification of fecal matter and formation of certain pungent gases such as ammonia, methane, hydrogen sulfide etc. The term ''pakva'' in this context indicates ''pakva mala''; not ''pakva ahara'' (Verse 9-11).
The portion that reaches the colon is the one that is designated as ''kitta''. During the third stage of digestion, there occurs the solidification of fecal matter and formation of certain pungent gases such as ammonia, methane, hydrogen sulfide etc. The term ''pakva'' in this context indicates ''pakva mala''; not ''pakva ahara'' (Verse 9-11).