It is the food bolus, that is, a mass of food that forms during the chewing phase of food, but when it is already digested by gastric acids within the stomach. It has a not very solid consistency and is characterized by having an acid taste, as well as being covered by a subtle slimy substance. Chyme appears in one of the last phases of digestion: after the disintegration of food (turned into a ball, due to the movements of the tongue when it is introduced into the mouth) thanks to some enzymes and, as mentioned above, to gastric juices.
The stomach, by releasing the substances that crumble the food, begins a series of contractions, which seek to achieve the proper functioning of these. In the middle of these movements, a small homogeneous mass is formed that will begin a journey to the intestine. During a few hours this process is carried out and the food particles are very small, therefore, they must be small so that they can enter their final destination easily. The pancreas begins to expel a substance that calms the effect of gastric juices, as well as the liver and gallbladder, thus speeding up the digestion process.
All the nutrients that the chyme contained pass into the blood, which transports them to the body and supplies the body with what is necessary for it to function correctly. If proteins and minerals are not absorbed in the small intestine, in the large intestine what remains is finally removed and then converted into feces, which is expelled from the body through the rectum.
