Food Digestion Research Paper

The esophagus receives food from the mouth after swallowing and then delivers it to the stomach. The stomach holds food which it is being mixed with enzymes which continue the process of breaking down the food into a useable form. When the contents of the stomach are processed they are released into the small intestine. In the small intestine food is broken down by enzymes released from the pancreas and bile from the liver, the food is moved through and mixed with digestive secretions. The small intestine is made up of three segments the duodenum, jejunum and the ileum, the jejunum and the ileum are mainly responsible from the absorption of nutrients in to the bloodstream. These contents start out semi-solid and end in a liquid form after passing through the organ. Water, bile, enzymes and mucous change its consistency, one the nutrients have been absorbed it then moves onto the large intestine. The large intestine connects to the rectum and is specialised in processing water so that emptying the bowels is easy.

Digestion starts in mouth and it is going through several steps. Teeth which are a Mechanical digestion start tearing and crushing the food down into small pieces so that the food will smoothly run down our throat. The salivary glands are located underneath the back of our tongues and that’s what is creating our saliva. The saliva is the Chemical Digestion is helping soften the food in the mouth so it is easy to swallow. Also saliva is the first out of several chemicals that is breaking the food into smaller bits. The tongue is the muscle that works with the food and saliva to form something similar to balls that can be swallowed. Also tongue contains taste buds so that we know if the food is salt, sweet, sour or bitter. Esophangus is a simple transportation tube that is joining the throat with stomach. When swallowing we are closing a trap door in our throats called the epiglottis. By closing this trap we are preventing the food prom going to trachea and into our lungs. Also Food moves down the esophangus using muscles not gravity. Stomach is the first stop after the Esophangus. When the food gets into stomach the stomach uses chemicals to try to make the food smaller. These chemicals are called gastric juices and they include hydrochloric acid and enzymes. (Enzymes are

Experimental Optical density (OD) of colored filtrate (reflects amount of bile 1 - OD (reflects amount of bile acid adsorbed by food particles)

4. Describe the hormonal control of the secretion of bile and pancreatic juice during the digestive process.

Digestion is the chemical breakdown of food molecules into smaller molecules that can be used by various cells within the body. The breakdown is initiated when food is ingested in the mouth and specific enzymes are exposed to components within the food molecules. Digestion begins in the mouth with mastication, or chewing, performed by the teeth. The purpose of chewing

When we want to eat, the brain sends a signal to the stomach that food is on the way. Stomach muscles then relax and prepare your stomach that will be filled with food. When food passes through the digestive tract, the stomach returns to its original size.

Bile is a green-colored liquid used for digestion that is created by the liver and stored by the gallbladder. There are bile acids (bile salts). They are used to absorb fats and for digestion. The absorption of fats happens in the small intestine.

fluid called bile that is released into the intestine through ducts. From the intestine, the plant sterols

Bile contains bile salts, bilirubin(breakdown product of hemoglobin), phospholipids, cholesterol, and inorganic ions. The bile salts are emulsifiers.Bilirubin from bile is converted in the intestine to urobilinogen-gives brown color to feces. Some urobilinogen filters back into blood, and is excreted in urine (giving yellow

3) What is “Bile” and why is it important? Bile is a digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats. (Webmd)

The gallbladder is a small storage organ shaped like a small pear under the liver, in which bile is stored after it is secreted by the liver and before it is released into the duodenum of the small intestine to break down any fatty foods. Bile comes from cholesterol, bile salts, and waste products and without the gallbladder there is no longer a storage place to hold the bile. It continuously runs from the liver, through the hepatic ducts, into the bile duct, and straight into the small intestine. When a rich in fat meal is consumed, there is too little bile accessible to digest it suitably.

The gallbladder stores and concentrates bile. If the gallbladder was damaged or dysfunctional there would be softer and more frequent stools. (Audesirk, T., & Audesirk, G. (1999). Retrieved November 21, 2015 from Chapter 29: Nutrition and Digestion. In Biology: Life on Earth (5th ed., p. 585, 586). Upper Saddle River, N.J.: Prentice Hall.) (General Surgery- Gallstones (Cholelithiasis). (n.d.). Retrieved November 21, 2015, from

The bile moves into the gallbladder via tiny tubes. The bile is stored in the gallbladder and waits, becoming concentrated, for the signal to be released into the duodenum aiding in digestion. Without bile, the body could not digest fats, as fats do not absorb into water. The bile acts as a detergent and allows the two to mix.

Digestion is the chemical breakdown of food into smaller components that are more easily absorbed. Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones. When food enters into stomach, gastric juice starts protein digestion. Gastric juice mainly contains hydrochloric acid and pepsin. The pH value of hydrochloric in the stomach is 2, as the activity of pepsin is optimal, while it will lose its activity at pH 6.5 and above. However, pepsin will regain its activity at pH of 8. In the range of pH1 to pH6.5, pepsin will be most active at pH2, and starts to decrease its

This substance is produced when a human digests lipids or fats. According to Sareen Gropper and Jack Smith’s “Advanced Nutrition and Human Metabolism” bile is produced through the process of chemically altering cholesterol, which is a type of fat found in a human’s blood. This process takes place in the liver and bile acids are produced. These bile acids are then conjugated or united with taurine and glycine to produce biosurfactants known as bile salts. The existence of bile salts inside of bile gives the substance the capacity to amalgamate lipids and fats with their aqueous (watery) environment inside of the gallbladder. According to Sareen Gropper and Jack Smith’s “Advanced Nutrition and Human Metabolism” bile is released from its origin (gallbladder) into the small intestine. Through the process of emulsification the bile substance in the small intestine disintegrates fats into much tinier particles which can be digested and absorbed at a much more efficient and quicker rate. This evidently shows that without bile and in turn bile salts the digestion of fats will not be