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Human Digestion and Raw Meat

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Kyle Wiens

on 20 April 2010

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Transcript of Human Digestion and Raw Meat

The Human Digestive System
A Prezi Presentation by Kyle Wiens and aslo the consequences of eating pork RAW DIGESTION = ESSENTIAL The energy we require comes from food that
is broken down into tiny pieces through the
essential process of digestion Food is digested until cells can use it
Different foods (Carbs, proteins, fats) are digested differently in the digestive process
Digestive system diagram -Food enters at the mouth The mouth MECHANICALLY DIGESTS food through chewing
The mouth CHEMICALLYDIGESTS food with its saliva
Saliva produced by specail glands in mouth
moistens food so it is easier to break down
contains AMYLASE - an enzyme that aids in breaking down large starch molecules into simpler sugars -food travels down the esophagus and into the stomach CHEMICAL AND MECHANICAL DIGESTION in the stomach Mechanical stomach wall muscles contract and move to help break up food
this movement also helps move around stomach fluid Chemical
stomach walls produce a liquid that contains HYDROCHLORIC ACID (HCl) and the enzyme PEPSIN
HCL -breaks down the bonds of protein molecules PEPSIN -breaks down bonds within amino acids of protein CHYME semi-liquid mixture that the stomach turns food into Now the food travels through
the small intestine Once the food has been sufficiently digested, a sphincter connecting the stomach to the small intestine allows CHYME to be squirted in during stomach contractions. yum... intestine lining turns and contracts to mechanically break down food most of the remaining digestion takes place in the part of the intestine closest to the stomach (DUODENUM) Enzymes and hormones produced in the gallbladder, liver and pancreas come to the duodenum to help with chemical digestion
LIVER and Gallbladder
The liver produces a substance called bile that is stored in the gallbladder and used in the small intenstine when fats need to be digested. Pancreas
produces an alkaline fluid that neutralizes the hydrochloric acid and denatures the enzyme pepsin
supplies various enzymes to aid the digestion of: small intestine *types of foods will be highlighted during the presentation to draw your attention to that information Protein
Fat trypsin
lipase Other helpful enzymes maltose, lactoce, sucrose (breaks down sugar into simpler molecules)
peptidase (breaks down proteins into amino acids) After passing through the DUODENUM the digestive process is complete and the molecules are small enough to be absorbed into the blood stream from the small intestine
Digestion absorption The digestive process in this presentation is all extracellular (process happens outside of cells)
Once it is absorbed into the blood cells for transport it becomes intracellular (process happens inside the cells) food is absorbed througout the rest of the small intestine and then enters the large intestine
food is no longer broken down
The Large intestine: absorbs water
compacts feces
absorbes the vitamins created by bacteria in the intestine
passes along waste to anus THE LARGE INTESTINE RAW pork - a case study Moral of the story - DON'T EAT RAW PORK!!!
The end disclosure 1
James eats the raw pork chop Why did Kim tell her brother that he was going to be sick after eating the raw pork? She was aware that raw meat contains bacteria. Although the body’s hydrochloric acid in the stomach can kill some bacteria it does not have the ability to kill all types of bacteria. The meat should be cooked through so that bacteria and parasites still alive in the food will be killed from the heat of cooking.

The most common bacteria that cause problems to humans when meat is not cooked properly are: Aureus, Salmonella, and Clostridium perfringens. DISCLOsure 2 James symptoms after eating the raw pork chop are: Cramps and diarrhea What may have caused James to be sick, according to the symptoms? James is likely sick from Clostridium perfringens.
He had been sick with cramps and diarrhea but NOT vomiting. Although most bacteria poisoning displays the symptoms of cramps and diarrhea they usually involve vomiting as well. Symptoms for Clostridium perfringens line up with diagnosis because its symptoms do not involve vomiting. This bacteria can be found on meat and inhabits dust, soil and gastrointestinal tracts of animals and humans. What effects does Clostridium perfringens have on the body.
This bacteria releases a toxin in the intenstinal tracts when there is a high concentration of the bacteria.
They only grow when there is little or no oxygen

After 24 hours symptoms should receed and he should feel better. Mild symptoms may remain for a week or two.

It is very unlikely that the sickness will result in death. sources information images http://aggie-horticulture.tamu.edu/extension/poison.html
Pages 977-982 of the McDougal Littell Biology textbook (online version)
http://4.bp.blogspot.com/_WeL00GGvLRk/Si1aHscGLiI/AAAAAAAAEk0/lmrhP4Ca-gg/s400/upset_stomach.jpg you've almost reached the end These are VERY Large and unnecessary words THese are even larger and just as unnecessary

This is as large as they will go.
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