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The human digestive system is a complex network of organs and structures that work together to process food, absorb nutrients, and eliminate waste. It begins with the mouth and ends at the anus, with several critical organs involved in digestion. The first part of the digestive system is the mouth, where mechanical digestion begins. Teeth break down food into smaller pieces, and the saliva, produced by salivary glands, contains enzymes like amylase that start the breakdown of carbohydrates. The chewed food then forms a bolus, which is pushed to the back of the mouth and swallowed. Once swallowed, the food travels down the __________ ____ ____ _______ _______ ________.
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