digestion  - Digestion is the process of breaking down complex foods into simple nutrients that the body can absorb., oesophagus - a long muscular tube, the part of the digestive tract that connects the throat to the stomach, stomach - the part of the digestive tract between the oesophagus and the small intestine; a bag of muscle that churns and mashes food, and releases gastric juices to help break it down,  small intestine  - the section of the digestive tract between the stomach and the large intestine; its main functions are to continue breaking down food and absorb the nutrients released, large intestine - the part of the digestive tract between the small intestine and the anus; its main function is to absorb water from digested food and provide a home for bacteria that break down complex carbohydrates, peristalsis - the automatic tensing and relaxing of muscles in the walls of the oesophagus or intestines, which pushes food along the digestive tract, physical digestion - slicing, grinding, mashing and churning to break substances into smaller pieces and mix them together, chemical digestion - using chemical reactions to convert substances into simpler chemicals that can be more easily absorbed by the body, microvilli/villi - a microscopic finger-like structure extending from the surface of a cell, increasing its surface area, absorb  - to take in a substance through tiny holes, windpipe - another name for the trachea, bile - a liquid produced by the liver and stored in the gall bladder that helps digestion by breaking fats into small droplets, liver - a large organ located next to the stomach that has many important functions; produces bile and releases it into the small intestine to help digest fats,

Digestive System

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