The first task of the digestive system is to break down food into a fine pulp (mechanical digestion).When the food is physical broken down, digestive chemicals break the food down into small molecules (chemical digestion).
Before anything can happen in the stomach, digestion of your food starts in the mouth. When you bite into food, your mouth releases an enzyme, salivary amylase, in the saliva that begins breaking down the food, making it softer and easier to swallow and initiating the digestion of starch. After some simple digestion in the mouth, the food is pushed down the esophagus and into the stomach. The stomach plays a necessary role in the digestion of protein and is considered your body's blender, churning the food to make absorption easier for the intestines. Big Ideas Digestion. Digestion is the breakdown of food into simpler molecules that can be absorbed by the body. The digestive system is actually a long hollow tube called the gastrointestinal tract, or GI tract. The digestive system includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. Several major glands include the salivary glands, the pancreas, and the liver. The first task of the digestive system is to break down food into a fine pulp (mechanical digestion). When the food is physical broken down, digestive chemicals break the food down into small molecules (chemical digestion). The mouth is the organ in which the process of digestion begins.  The cardia is the first portion of the stomach and is where food content passes from the esophagus into the stomach. The acids and enzymes referred to as the gastric juices are manufactured in the cardia. The fundus stores undigested food and also the gases released from the chemical digestion of food. Function of the stomach. 1  The stomach is J-shaped and it can expand to temporarily store food. 2  Partial digestion of the food takes place here. 3  The stomach releases acids and enzymes for the chemical breakdown of food. 4  The stomach releases food into the small intestine in a controlled and regulated manner. The mouth is the beginning of the digestive tract. In fact, digestion starts here as soon as you take the first bite of a meal. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use. Digestion in the Mouth. Chemical digestion of food begins in your mouth with the secretion of saliva. The first macronutrients to undergo chemical digestion are starch, which is a type of complex carbohydrate found in potatoes, corn and root veggies, and fats from animals and plants.  The stomach is not the only part of your digestive system that absorbs food but rather is a part of the digestive system and important for churning food into a consistency that is easier to digest for the rest of your intestines. Function of the stomach. 1  The stomach is J-shaped and it can expand to temporarily store food. 2  Partial digestion of the food takes place here. 3  The stomach releases acids and enzymes for the chemical breakdown of food. 4  The stomach releases food into the small intestine in a controlled and regulated manner. Digestion begins in the mouth with the secretion of saliva and its digestive enzymes. Food is formed into a bolus by the mechanical mastication and swallowed into the esophagus from where it enters the stomach through the action of peristalsis. Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream. The stomach, working as a blender, has three main functions: store the food, break down the food into a liquid and empty the liquid into the small intestine. The first digestive step is the mechanical digestion in the stomach known as peristalsis. Peristalsis is simply a series of muscle contractions that breaks down the food into a soft liquid mixture, called chyme. After some simple digestion in the mouth, the food is pushed down the esophagus and into the stomach. The stomach plays a necessary role in the digestion of protein and is considered your body's blender, churning the food to make absorption easier for the intestines.
http://healthyeating.sfgate.com/kinds-nutrients-digested-stomach-10108.html https://msu.edu/~potters6/te801/Biology/biounits/digestion.htm http://www.laparoscopic.md/digestion/stomach http://www.webmd.com/heartburn-gerd/your-digestive-system http://woman.thenest.com/digests-first-protein-carbohydrates-fat-10342.html http://www.laparoscopic.md/digestion/stomach https://en.wikipedia.org/wiki/Digestion http://healthyeating.sfgate.com/kinds-nutrients-digested-stomach-10108.html
what types of food are digested in the stomach first