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In Ayurveda, ahara (food), swapna (sleep) and brahmacharya (celibacy) are considered as tryo-upasthambha or sub supporting pillars of life. Food is critical for the sustenance of life; it is the first of the three, followed by sleep and brahmacharya. Foods are any substances containing nutrients, such as carbohydrate, proteins and fats that can be ingested by a living organism and metabolized into energy and bodily tissues. Digestion is the process of breakdown of complex form of food into simplest monomers through enzymatic process in gastrointestinal tract. Concept of gastrointestinal tract is very much elaborated by the Ayurvedic Samhitas. A consistent, clear and precise anatomical description for the most part of the gastro-intestinal tract has been furnished by Atreya Samhita which has been quoted by Vaidyaka-Sabda Sindhu. The gastrointestinal tract is described by various terms like Mahsrotas, Annavaha srotas and Kostha etc. In Ayurveda, the digestive system is considered vital for overall health and is known as "Agni," meaning digestive fire. This article provides a concise overview of the Ayurvedic perspective on the physiology of the digestive system. According to Ayurveda, the digestive system consists of various organs and processes working in harmony to digest and assimilate food. The key organ systems involved include the mouth, stomach, small intestine, large intestine, liver, and pancreas. The proper functioning of these organs is essential for maintaining optimal health and preventing diseases.