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The Digestive System

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Kaitlyn Torrie

on 22 April 2010

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Transcript of The Digestive System

The Digestive System Digesting Proteins Digesting Lipids Digesting Carbohydrates Digesting Vitamins Digesting Water & Salt Organs Involved in Digestion Intracellular Digestion Extracellular Digestion Chemical Digestion Physical Digestion Why did Kim tell her brother that he was going to be sick after eating the raw pork? What may have caused James to be sick, according to the symptoms? Once you have determined a cause, explain what effect(s) this would have on his body. Proteins need to be digested by enzymes before they can be used. The main digestion of protein starts in the stomach. In the intestines, the pancreas enzymes and the lining of the intestines complete the breaking down of the huge protein molecules to small molecules called amino acids. The amino acids are then absorbed by the body. Occurs when acid is used
to break food down. Occurs when teeth (or gums) break food down. Food particles are broken down
chemically into smaller peices outside
the cell or in a digestive system space. When the food particles are taken
to the liposome's and food vacuoles
for digestion. -salivary glands
-esophagus
-stomach
-liver
-gall badder
-pancreas
-intestines (large & small)
-rectum
-anus Fat is digested in the intestines. The bile acids (produced by the liver) dissolve the fat into smaller pieces, then the pancreas and the lining of the intestines break the pieces into smaller ones (usually into fatty acids and cholesterol). The bile acids then combine with the cholesterol and fatty acids so these can be absorbed by the mucosa cells. Then the small fat molecules are formed back into larger molecules. The fat is then tranferred to vessels (lymphatic) and they carry the fat to veins in the chest, then to the rest of the body. Vitamins are absorbed through the
small intestine. There are two types
of vitamins: water-soluble and fat-soluable. The water-soluble vitamins
are hard to store and usually lost in
the urine. While fat-soluble vitamins
are stored in the liver and in the
fatty tissues. Sugars and Starches Starch is digested in two steps. First the saliva and the pancreatic juices break down the starch into maltose. Then the lining of the intestines split the maltose into glucose and then it is absorbed by the blood. Through the blood it is transferred to the liver.
Sugar is digested in one step. The lining of the intestine splits the sucrose into fructose and glucose. These are absorbed into the blood. Fiber Insoluble fiber is indigestable (indestructable) and it just passes in the body. The soluble fiber dissolves easily in water and turns into a gel like consistency in the intestines. This is digested mostly in the intestines. Water dissolves the salt and then the body absorbs it. She knew that the uncooked pork may contain parasites that will make him sick. Any food bugs will make you sick. Trichinosis is a sickness from parasites (roundworms). There are two phases:

1st phase- begins 1-2days after ingestion
-Symptoms- discomfort, diarrhea, nausea
2nd phase- begins 2-8 weeks after ingestion
-Symptoms- muscle aches, itching, fever, chills and joint pain

You get trichinosis when you ingest raw pork, bear, walrus, fox, rat, horse and lion meat.
James ingested raw pork and he had symptoms of trichinoses and thats why I think he has this sickness.
Trichinosis can affect and damage body tissues. The roundworms produce more worms that spread through the body via blood. The worms usually invade the muscle tissues including in the heart, diaphram, lungs and brain. trichinosis can lead to possible complications including encephalitis, heart failure, heart rhythm problems and pneumonia. Bibliography http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd
http://www.biology-online.org/dictionary/Intracellular_digestion
http://www.biology-online.org/dictionary/Extracellular_digestion
http://www.medicinenet.com/trichnosis/article.htm
http://www.nlm.nih.gov/medlineplus/ency/article/000631.htm
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