Digestive+System

Digestive System By: Riley Rosenkranz



> **Chemical Digestion:** Breakdown of food into smaller compounds. > > __**Vocabulary Words**__ > > **Mastication:** form of mechanical digestion. When food enters the mouth > > **Salivary Glands:** Saliva is secreted from.Gastric Juice: Starts protein digestion > > **Cephalic Phase:** This phase occurs before food enters the stomach and involves preparation of the body for eating and digestion. > > **Gastric phase:** This phase takes 3 to 4 hours. It is stimulated by distension of the stomach, presence of food in stomach and decrease in pH. > > **Intestinal phase**: This phase has 2 parts, the excitatory and the inhibitory. > > **Pharynx:** The pharynx is the part of the neck and throat situated immediately behind the mouth and nasal cavity, and cranial, or superior, to the esophagus. > > **Stomach:** The stomach is a small, 'J'-shaped pouch with walls made of thick, distensible muscles, which stores and helps break down food. > > **Small Intestine:** After being processed in the stomach, food is passed to the small intestine via the pyloric sphincter. > > > **Large****Intestine:** After the food has been passed through the small intestine, the food enters the large intestine. > > > > > __Information __ > > **Food enters your mouth. Where mechanical digestion occurs.** > > > > > > **Food is then passed down through your esophagus** > > > > > > > > **When food is passed into the stomach. Protein digestion is occurring due to gastric acid inside stomach, mechanical mixing occurs by peristalsis, which are waves of muscular contractions that move along the stomach wall. This allows the mass of food to further mix with the digestive enzymes. After some time (typically an hour or two in humans). The resulting thick liquid is called chyme. When the pyloric sphincter valve opens, chyme enters the duodenum where it mixes with digestive enzymes from the pancreas, and then passes through the small intestine in which digestion continues.** > > > > > > > **When the chyme is digested 95% of nutrients absorbents happen in the small intestine.** > > > > > > **Water and minerals are reabsorbed back into the blood in the colon (large intestine).** > > > > > > > > **__System Interactions__** > > ** Circulatory system :** supplies blood (and therefore oxygen) to the tissues, allowing them to stay alive. Also carries away nutrients > > **Excretory System:** The waste and urine from the digestive system is transferred to this system. > > **Respiratory System:** Many of the same body parts are used in both digestive and respiratory systems. The mouth and esophagus just to name a couple. Oxygen goes down the esophagus to the lungs just like food goes down the esophagus to the stomach. > > > __**Diseases / Disorders**__ > > **Gastritis**: is the inflammation of the lining of the stomach. This condition can be an **acute** (with rapid onset, short period, and usually severe intensity) or a **chronic** condition. I have been diagnosed with an acute case of gastritis, and let me tell you it is no fun. How my doctor explained it was that pretty much my body is producing to much stomach acid (she had to dumb it down for me). This disease is not life threatening. To diagnose the procedure is called a gastroscopy. Where a small camera is carefully threaded down the throat. They can also diagnose it with blood tests. > > **Lactose, Fructose and Sucrose Intolerance:** The body’s inability to absorb these basic sugars. Of these three, the most common is lactose intolerance. > **Crohn’s disease:**is an inflammation of the digestive tract, thought to be caused by an abnormal immune reaction to food, bacteria, or even the lining of the intestines or colon. Symptons are > > > Did you know information: > > > 90% of asian adults are lactose intolerant. > > We eat about 500kg of food each year. > > 1.7 liters of saliva is produced every day. > > In the mouth food is either cooled or warmed to a suitable temperature. > > 70 year olds produce as little as half the enzymes they did when they were 20. > > I have 2 dogs. > > I am presently single. > > I like long walks on the beach > > Call me. > **__Bibliography:__** > > http://en.wikipedia.org/wiki/Digestion > > http://library.thinkquest.org/J0112205/interesting_facts.htm > > Pictures provided by Google Images. >  >
 * **Digestion**: The process by which food is converted into substances that can be absorbed and assimilated by the body. It is accomplished in the alimentary canal by the mechanical and enzymatic breakdown of foods into simpler chemical compounds.
 * **Mechanical Digestion**: occurs in the mouth when you chew.
 * Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones.
 * Diarrhea
 * Abdominal pain
 * Blood in the stool
 * Black, tar-like stool
 * Fever
 * Weight loss and malnutrition
 * Anal fissures or fistulas